Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa6391606d8fa82d…

MALICIOUS

PDF

94.1 KB Created: 2021-07-13 10:07:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 53854a146b2d16f9868380b31eeeb163 SHA-1: 0dafb4815508caf998365a39297ce990624dc562 SHA-256: fa6391606d8fa82d780f58758e3a661da729f0daa3b5803f2298b7d390b90d8f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, pointing to numerous URLs hosted on compromised or disposable domains, suggesting a phishing or malware distribution scheme. The presence of external URIs and link farms strongly supports an attack pattern aimed at redirecting users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9935

Heuristics 6

  • 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.
  • 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://marinapogon.pl/upload/file/vadexupopuxek.pdf In PDF document text
    • http://www.festivalmarrakech.info/wp-content/plugins/formcraft/file-upload/server/content/files/160dba7e4ae5e9---90763193882.pdfIn PDF document text
    • http://ckattorneys.net/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/kibupagewomolajelubuvi.pdfIn PDF document text
    • http://upperdublin1970.com/clients/3/3b/3b2fb281f4756d03d37a29c41a8c1d95/File/62114132539.pdfIn PDF document text
    • http://gazosilikatnn.ru/uploads/files/xegogiga.pdfIn PDF document text
    • http://csc028.com/userfiles/file/20210618233413_48rg6m.pdfIn PDF document text
    • https://growlocals.com/wp-content/plugins/super-forms/uploads/php/files/9444fddf5722da7fe61a03565a9b98af/24206031652.pdfIn PDF document text
    • http://alibabashipping.com/userfiles/file/moxizuxiwe.pdfIn PDF document text
    • https://asiatravel.kg/wp-content/plugins/super-forms/uploads/php/files/7c61300dad99d053d4bbd35ef9d3bcb2/76919841801.pdfIn PDF document text
    • http://ozkayalartrans.com/userfiles/file/gososuluwemomopemamanune.pdfIn PDF document text
    • https://sitpchemcieszyn.pl/_sitpchem/file/54097408430.pdfIn PDF document text
    • https://amesmedicalservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071090425182---didemotebomifekukefuke.pdfIn PDF document text
    • http://kameleonhastanc.hu/files/file/20134092874.pdfIn PDF document text
    • http://lilit-realty.com/wp-content/plugins/super-forms/uploads/php/files/c4b2u47m5m5rnah38jg0fg7ld5/34449075361.pdfIn PDF document text
    • http://aucoindeshalles.fr/menu/file/kotexi.pdfIn PDF document text
    • https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160afcb0480a98---11370970683.pdfIn PDF document text
    • http://www.agrosystem.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16090c8e7a7a83---rumejitijunugajolatukav.pdfIn PDF document text
    • https://envomask.com/wp-content/plugins/super-forms/uploads/php/files/2fcfc3f92ac131d23eaeafed14e3df5e/palaxazuvozobupipixi.pdfIn PDF document text
    • http://highlandhighclassof1962.com/clients/c/c3/c330a44b04b080977bf299ea430a317d/File/xewaguse.pdfIn PDF document text
    • http://dermalab.pl/userfiles/file/divurosaporafe.pdfIn PDF document text
    • http://yogo110.com/userfiles/file/bokatekagujo.pdfIn PDF document text
    • http://sloplast.com/userfiles/files/jobobukewu.pdfIn PDF document text
    • https://webtraffic.ch/wp-content/plugins/super-forms/uploads/php/files/pbk578v6h4rdc9dgb7u0ma3n89/26604230820.pdfIn PDF document text
    • http://swaminarayangm.org/userfiles/file/walelivirakulewamujeza.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=wow+classic+holy+priest+levelingPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010d89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D89 16904 bytes
SHA-256: 6478bcb76bf4934a5e5ba1adba0262239966e155a14e3b2e743732447dfb88d9
font_01_sfnt_off000139d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x139D8 10912 bytes
SHA-256: 52dabcf5b849ffb240fa625abf126d97809e5780c7d2c0764bc6e1fc781521c9
font_02_sfnt_off0001532f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1532F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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