Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d31ff01382132eb…

MALICIOUS

PDF

111.5 KB Created: 2021-07-01 18:19:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: b24c01ba620c85b0920625c2b397cfce SHA-1: d18fb4cf7e8ff14cf973b85468458030dc57ab25 SHA-256: 1d31ff01382132eb8f1c8a4a9523cc3d1bf98845c77b449518b58be808913d4f
236 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File T1059.001 PowerShell

This PDF file was detected as malicious by ClamAV and an ML classifier. It employs social engineering tactics, specifically a 'ClickFix' lure, by instructing the user to copy and paste content into a terminal (e.g., Win+R, PowerShell, cmd). This is a common method to execute commands and download secondary payloads, bypassing traditional macro security. The document also contains numerous links to potentially compromised websites, suggesting a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9868

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ag-concept.ru/wp-content/plugins/super-forms/uploads/php/files/9144860666a67d1c3e10088c0f9e76f5/57694787520.pdf In PDF document text
    • https://primewestelectrical.com/wp-content/plugins/super-forms/uploads/php/files/bfc08acd13aa623b145fbb8d148b7640/413741156.pdfIn PDF document text
    • http://keyflounge.nl/userfiles/file/30995058141.pdfIn PDF document text
    • http://cheers-gifts.com/userfiles/31372566955.pdfIn PDF document text
    • https://bowenpainter.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d8a66b315c2---fazab.pdfIn PDF document text
    • http://generaltubi.com/container/ckfiles/files/lovukorumezuboko.pdfIn PDF document text
    • https://www.sehersirin.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074379358e35---79494647589.pdfIn PDF document text
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607495839ec8b---44007052174.pdfIn PDF document text
    • http://agataklimowska.pl/userfiles/file/kizevowobitusurimamobiz.pdfIn PDF document text
    • https://www.picmephotoboothhire.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160812cba226e9---38957258671.pdfIn PDF document text
    • https://www.thecandystoresudbury.com/wp-content/plugins/super-forms/uploads/php/files/qh3ua6rk24j3v3k1icjrbfl9qs/32523673446.pdfIn PDF document text
    • http://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd61a8c736c---bowazunoniro.pdfIn PDF document text
    • http://101eyewear.com/luutru/files/66243542705.pdfIn PDF document text
    • http://www.fattyweng.com.sg/wp-content/plugins/formcraft/file-upload/server/content/files/160a4ac17d0799---mudatozusidewanagilozate.pdfIn PDF document text
    • https://wholisticvibrations.com/wp-content/plugins/super-forms/uploads/php/files/134d6aaf22c2d2b2ae2d68403efb8767/7418869789.pdfIn PDF document text
    • https://www.fmworks.com.tr/wp-content/plugins/super-forms/uploads/php/files/00brputc224h33fusriv1ourbu/xenukafizawisaxixuf.pdfIn PDF document text
    • http://greenlivinggarden.com/htdocs/UserFiles/file/milubesagubimagaxaniteled.pdfIn PDF document text
    • https://ietc-oman.com/userfiles/files/66729759515.pdfIn PDF document text
    • http://dighakanchaninternational.com/FCKeditor/file/mafenelurujutajo.pdfIn PDF document text
    • https://deitratech.com/userfiles/file/xejakebitabifi.pdfIn PDF document text
    • http://www.holzbau-hoelzl.at/wp-content/plugins/formcraft/file-upload/server/content/files/160b22ba12372b---duliririgojubexozimo.pdfIn PDF document text
    • http://allseasonsart.com/uploads/fck_uploads/file/20568582711.pdfIn PDF document text
    • http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/1607201c085d05---46956119071.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160b7768df0753---25764140793.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=banned+pollutants+in+brief+crosswordPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013358.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13358 10992 bytes
SHA-256: 725c282fd1f438668f6ed327f11e5c1d2409e655321db48e1ac8690fe2bf95bf
font_01_sfnt_off00014cd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14CD9 20972 bytes
SHA-256: 1b3011b3b08c361a71e63bc5a509c0c3958ad8429dba500524e412d2d0d43996
font_02_sfnt_off00018297.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18297 16120 bytes
SHA-256: 19fb3e0837d6f9ee728c5331d7bb33e1bff3d595bd4ca4a0aae7833d7d421d60
font_03_sfnt_off000197f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x197F1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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