Malicious PDF — malware analysis report

Static analysis result for SHA-256 578156890571b4a4…

MALICIOUS

PDF

88.2 KB Created: 2021-06-26 13:48:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 5308c6263e801576aedaf9f7b37dcc1b SHA-1: 39cc68c51e14abea0d9b9c7cb9e25e96b4844c2a SHA-256: 578156890571b4a42b9301b3dc12c1b6807267a6d6d7aca3c9aa3555f3f091cc
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous links pointing to compromised WordPress sites and disposable hosting, suggesting an attempt to redirect users to malicious content. The presence of external URIs and link farms strongly indicates a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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 https://pistant.ru/uplcv?utm_term=1+pood+in+lbs PDF link annotation
    • http://eske.hu/wp-content/plugins/formcraft/file-upload/server/content/files/160865f8f2851a---8639636427.pdfIn PDF document text
    • http://www.webtony.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607678b3c4d47---18887519012.pdfIn PDF document text
    • http://mdbim.pl/ubezpiecz/obrazy/file/gavanuki.pdfIn PDF document text
    • https://jdlpartnerss.com/userfiles/file/3295773296.pdfIn PDF document text
    • https://rffsev.ru/wp-content/plugins/super-forms/uploads/php/files/804397d1caabf58e6416b7b938a77be9/54714998439.pdfIn PDF document text
    • http://tsg-vaganovskoe.ru/ckfinder/userfiles/files/93542968620.pdfIn PDF document text
    • http://naturallabs.fr/userfiles/file/worowubag.pdfIn PDF document text
    • http://jointrilogy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090833309a75---31718048549.pdfIn PDF document text
    • http://royalgoodviewresort.com/Uploads/file/49684197565.pdfIn PDF document text
    • http://christembassydocklands.org/wp-content/plugins/super-forms/uploads/php/files/dc2931e10a62c19c74da57e761a96be0/65300212045.pdfIn PDF document text
    • https://spherule.org/wp-content/plugins/super-forms/uploads/php/files/3d8dc118a1f9c690c41e3ee48f7d3811/53783229369.pdfIn PDF document text
    • http://thesetnews.com/images/fckeditor/file/66037837404.pdfIn PDF document text
    • http://txextremecarts.com/userfiles/file/48652790700.pdfIn PDF document text
    • http://www.lbf-cosmetics.com/website/wp-content/plugins/formcraft/file-upload/server/content/files/1607a403f91f04---midajodulabasexuro.pdfIn PDF document text
    • https://fitnessrev.net/wp-content/plugins/super-forms/uploads/php/files/vkghlaol7dvvglb33adiopsoql/81381510515.pdfIn PDF document text
    • http://aylincinarli.com/fckfiles/file/xusixowuromiwakasevileguv.pdfIn PDF document text
    • https://mannerfeltdesignteam.se/ckfinder/userfiles/files/11391841262.pdfIn PDF document text
    • https://conexusinternational.com/ckfinder/userfiles/file/goperumevilifelorexezoda.pdfIn PDF document text
    • http://grupogmec.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094a72b4db52---44354565055.pdfIn PDF document text
    • http://3duct.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a01e8e7933f---86482745540.pdfIn PDF document text
    • http://drthchowdary.net/userfiles/file/81574512543.pdfIn PDF document text
    • http://www.morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d582822097---79748522087.pdfIn PDF document text
    • http://bizwd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4361fa2bd9---wipobutozolazesim.pdfIn PDF document text
    • http://georgekoldun.com/var/upload/file/lunituxawasosix.pdfIn PDF document text
    • https://irish-setter-zucht.info/ckfinder/userfiles/files/60113114447.pdfIn PDF document text
    • 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_off0000f462.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF462 9988 bytes
SHA-256: 3d2394dd27d2bd5f6a8d69dac7b656f365a6792ba07db54f74f22036d5f3f8fd
font_01_sfnt_off00010a44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A44 19132 bytes
SHA-256: 380dfdf35d86b949f0bd5f839983dacbf0645d9242e34aa42a82d5d3827d8cab
font_02_sfnt_off00013bc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13BC1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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