Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1beede54efb77aa…

MALICIOUS

PDF

86.1 KB Created: 2021-09-05 02:52:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: da1dc213314e5939aa511fa7f4695a8f SHA-1: b57a3c1263588eb1e7f8bca84a4712db9ea5e5aa SHA-256: d1beede54efb77aa21ed8a9f646a154271b5c52c5ace95efb568789b5eec9812
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. It contains numerous external links, many pointing to compromised WordPress upload directories or disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The presence of a 'download' button heuristic further supports a lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://www.padanguparduotuve.lt/ckfinder/userfiles/files/rumif.pdf In PDF document text
    • http://ambvetsanprospero.eu/userfiles/files/91801793381.pdfIn PDF document text
    • http://ciccioinpentola.com/userfiles/files/dadukagibatezibuwilapi.pdfIn PDF document text
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/a5063f7e48244f13267f86f224e03101/78298900710.pdfIn PDF document text
    • https://mollis.rs//files/mobuda.pdfIn PDF document text
    • https://oneremote.ru/wp-content/plugins/super-forms/uploads/php/files/b46e810fa6c93f015a11918042c83f02/fizedoxuzaxefaporunipezu.pdfIn PDF document text
    • http://ktcz.eu/files/files/dufusunepimurutunoso.pdfIn PDF document text
    • http://www.jesuseslaroca.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606d5b7df0a55---pijupur.pdfIn PDF document text
    • http://euredit-editions.com/userfiles/file/zaponu.pdfIn PDF document text
    • http://pm-property.pl/userfiles/file/56042065507.pdfIn PDF document text
    • https://elitteaccesorios.com/wp-content/plugins/super-forms/uploads/php/files/8j7mp52sf03qeucv2m6ni4ojfk/38315636844.pdfIn PDF document text
    • https://heritagelogs.com/wp-content/plugins/super-forms/uploads/php/files/c0sn7ab6lsvfb1j49lodjjeoia/wuduxinunupal.pdfIn PDF document text
    • https://monamifrance.com/FileData/ckfinder/files/20210623_027D6731275E866C.pdfIn PDF document text
    • http://eatatrudy.com/uploads/files/88865384990.pdfIn PDF document text
    • http://theleadershipworks.com/PO2/UPFILE/userfiles/files/gabobe.pdfIn PDF document text
    • https://joepromenshealth.com/wp-content/plugins/super-forms/uploads/php/files/e13c065de857fc87f086c180ce6cc4da/69651275930.pdfIn PDF document text
    • http://anatolianlgs.com/userfiles/file/tivebegijagonavan.pdfIn PDF document text
    • https://yodishit.com/uploads/userfiles/file/68815669613.pdfIn PDF document text
    • https://tekartltd.com/upload/files/51861533180.pdfIn PDF document text
    • http://dhs1970.com/clients/9/98/98bceae81adeaace0f0761aa7b0d12fa/File/jarigajegupena.pdfIn PDF document text
    • http://psychologyforeverybody.com/ckfinder/userfiles/files/85819800172.pdfIn PDF document text
    • http://ne-moloko.ee/wp-content/plugins/super-forms/uploads/php/files/ad42c798bd61a026a4ac12712d591e63/paseg.pdfIn PDF document text
    • https://www.apartamentselsllacs.com/wp-content/plugins/super-forms/uploads/php/files/4mbr4acftpvps6b9v9khddkap0/31820895155.pdfIn PDF document text
    • http://gyobel.itpublic/file/26304940083.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=b.com+first+year+english+notes+pdfPDF 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_off0000e75f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE75F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ff76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF76 11300 bytes
SHA-256: d74fb4396259e808e7321431f9c9b48361d6e6a16961788f29702d379648fe56
font_02_sfnt_off000119a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119A9 18688 bytes
SHA-256: c92efa768d88949e0d3ab9319a9a5f2062d3b68ea06ac451b858e0b0a0f2c477