Malicious PDF — malware analysis report

Static analysis result for SHA-256 38fd542738e6e27b…

MALICIOUS

PDF

78.2 KB Created: 2021-03-20 22:48:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 3dfad8ca5748277b92406aea2a6142a4 SHA-1: 564bfee89c13a6b94358b48a1c50fa761df299a1 SHA-256: 38fd542738e6e27b4098345c61391916a96af63f0e53b0d369e0813ffd38d5e2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://vilenefex.ru/award?keyword=nature+of+statistical+learning+theory+pdf PDF link annotation
    • http://paypallsecurity.com/muniwabunuwozexidogexelij0qsz.pdfIn PDF document text
    • https://ferezarital.weebly.com/uploads/1/3/4/8/134862234/zutaxewak.pdfIn PDF document text
    • http://eglo.club/what_to_do_when_you_are_unhappy_in_a_relationshipss97d.pdfIn PDF document text
    • http://rodsfish.club/nijapopuwobugozv0l5.pdfIn PDF document text
    • https://vominitaxa.weebly.com/uploads/1/3/4/6/134677623/e521a13590.pdfIn PDF document text
    • http://securespot.ru/g_shock_mudman_manual6dl95.pdfIn PDF document text
    • https://zokesafan.weebly.com/uploads/1/3/0/7/130775675/vemikivorajixa.pdfIn PDF document text
    • http://comp-arenda.site/is_it_okay_to_eat_take_out_food_during_covid_19v1asg.pdfIn PDF document text
    • https://sewobefavewekog.weebly.com/uploads/1/3/4/3/134367647/natimuderuxitajegid.pdfIn PDF document text
    • http://presentinsta.site/lazoroxedinujoteli2729k.pdfIn PDF document text
    • https://lavafijaxeb.weebly.com/uploads/1/3/0/7/130740432/216ff82ce6.pdfIn PDF document text
    • http://ranking-se.com/sadixobegexavekipkm804.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/loxopudizus/architecture_apps_android_free.pdfIn PDF document text
    • https://b09d99c6-da67-4e55-b5b3-baceba093817.filesusr.com/ugd/a69c6c_be646cceaf1e4188b833ff4a756fdc36.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/mexijegedakol/gallic_rome_guide_empire_divided.pdfIn PDF document text
    • https://s3.amazonaws.com/safenalavojuwu/58648522408.pdfIn PDF document text
    • https://s3.amazonaws.com/turip/70824971432.pdfIn PDF document text
    • https://74269c25-1731-4359-90d4-804f54ef9c1c.filesusr.com/ugd/b5973a_48b409c88be947baa269528914482cf7.pdf?index=trueIn PDF document text
    • https://caa91486-5fcc-43b7-8b2b-5b817ae85bbe.filesusr.com/ugd/26bbcf_1bb34feae03a4bafb11ee66b91759ea7.pdf?index=trueIn PDF document text
    • https://68e1e3d4-268d-49bc-a8aa-b119cb10fea7.filesusr.com/ugd/3ceeb9_5b7af71376b445f1818191503efd09ee.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/ruzaganog/expense_budget_template_business.pdfIn PDF document text
    • https://e942959e-95af-4115-ab05-a6e38533eaad.filesusr.com/ugd/66f7a0_f0c2be7b8a4a4c0fbefe88e8b81867cd.pdf?index=trueIn 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://scripts.sil.org/OFLIn PDF document text

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f187.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF187 5488 bytes
SHA-256: b78ca022fa379c04295294d80a77e8f9472872fe24fe2f974fd462a567ae57ff
font_01_sfnt_off00010442.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10442 10948 bytes
SHA-256: 3966f6632c409bba42006ef53e5a4849c0e591fa0ef84e203bae2fd48a124e6e

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