Malicious PDF — malware analysis report

Static analysis result for SHA-256 34e9e46e99e9cc65…

MALICIOUS

PDF

83.2 KB Created: 2021-09-23 16:08:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 0f038dce7b5658fc61b2dafdb6ec404a SHA-1: 6147df7233835c8c3fde9f98767d7f0b77fd6553 SHA-256: 34e9e46e99e9cc65df9980cfe06bb9663c181a4c1798982ac3151e51d359abe6
196 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1566.001 Spearphishing Attachment

This PDF document exhibits malicious characteristics, including a high ML classifier score and a critical ClamAV detection. The heuristic 'SE_CLIPBOARD_COMMAND_LURE' indicates the document instructs users to copy and paste content into a command-line interface, a common tactic for executing malicious payloads. The presence of numerous links to potentially compromised or disposable hosting sites further supports a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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
  • 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 http://shepardinteriordesign.com/rw/upload/file/50005171356.pdf In PDF document text
    • https://bf-pomosch.ru/wp-content/plugins/super-forms/uploads/php/files/hhbkrck72gme74g2k5k3fq14r5/50098696225.pdfIn PDF document text
    • https://ehotelgateway.com/bot/ckfinder/uf/files/gefuxi.pdfIn PDF document text
    • http://wabasnb.com/files/fckeditor/file/548368367614016be29d4f.pdfIn PDF document text
    • http://kavernoklub.com/campannas/file/tasanik.pdfIn PDF document text
    • https://kapokcmassage.com/uploads/files/202109110914083250.pdfIn PDF document text
    • http://elosc.com/upFile/file///ITX202109021133276376.pdfIn PDF document text
    • http://centromedicoveterinarioadda.com/userfiles/files/41192865720.pdfIn PDF document text
    • https://picinterior.com/ckfinder/userfiles/files/72493090151.pdfIn PDF document text
    • https://1sis.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f334f7b201---supimob.pdfIn PDF document text
    • http://watthaistuttgart.de/userfiles/file/84092647552.pdfIn PDF document text
    • http://studio-orlandini.com/userfiles/files/40359150047.pdfIn PDF document text
    • http://3qbuy.com/CKEdit/upload/files/zilusebafamaz.pdfIn PDF document text
    • http://e2ingenieros.com/ckfinder/userfiles/files/41309570967.pdfIn PDF document text
    • https://fmpride.com/wp-content/plugins/super-forms/uploads/php/files/339c1910fc24c5bca99d3e7bc9523d2b/11383605548.pdfIn PDF document text
    • http://nerezove-kuchyne.cz/UserFiles/File/xuzetatibekutat.pdfIn PDF document text
    • http://huanghels.com/filespath/files/20210907233133.pdfIn PDF document text
    • http://babywagen24.de/userfiles/file/97967499106.pdfIn PDF document text
    • http://sineadstone.com/userfiles/file/12245623153.pdfIn PDF document text
    • http://shyjjc.com/v15/Upload/file/2021923651318414.pdfIn PDF document text
    • http://www.moyekolodin.com/files/6234054562.pdfIn PDF document text
    • http://celeb.huh.hu/UserFiles/File/35332086505.pdfIn PDF document text
    • https://xn--i1aam8cb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/88891cfceb36d6272dfebd870cb984c4/81624315333.pdfIn PDF document text
    • http://jingkangchem.com/upload/files/72573438883.pdfIn PDF document text
    • http://spbi.cz/res/file/newijofurirose.pdfIn PDF document text
    • https://egyseg.eu/ckfinder/userfiles/files/88918661530.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=ppsspp+ios+appPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e34f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE34F 17728 bytes
SHA-256: 31f51c864a0a543a36b39324b2e0d3db0dab0357366de8960b87b32430b53646
font_01_sfnt_off0001118d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1118D 9768 bytes
SHA-256: 3838b17c09db64e35aa23b62a4dd18d9bcfe11ac3ee25d053d2e159425c5e92e
font_02_sfnt_off00012703.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12703 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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