Malicious PDF — malware analysis report

Static analysis result for SHA-256 55f9b3bf582b2566…

MALICIOUS

PDF

91.1 KB Created: 2021-03-14 06:31:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 5a12f3f6361e507ee9596eb70f89656e SHA-1: d4df03d164ad7e13ec36ffb64377e3cb71820e01 SHA-256: 55f9b3bf582b2566b906fe5875e3fd6765ce1a8ae5117453bbb128881c1b89bc
156 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9992

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://baarspo.ru/wix?keyword=evansville+license+branch+east+hours PDF link annotation
    • http://timecodes.net/kotavewasaburorexe618sk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489402/normal_5fdf29ed98efa.pdfIn PDF document text
    • https://benokonafininu.weebly.com/uploads/1/3/4/6/134606635/tupulizex.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378608/normal_60044cc32905d.pdfIn PDF document text
    • http://price-list.moscow/80158763959bbi1j.pdfIn PDF document text
    • https://dewufore.weebly.com/uploads/1/3/4/8/134857007/4306169.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470537/normal_60471595d2a12.pdfIn PDF document text
    • https://fizemovumevomuf.weebly.com/uploads/1/3/4/4/134491325/sapana.pdfIn PDF document text
    • http://teren.fun/love_that_dog8bwps.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369760/normal_6032c94f8dfb8.pdfIn PDF document text
    • https://pagejenaxupiwig.weebly.com/uploads/1/3/4/3/134383440/jezofemibakozuxeb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407729/normal_603dfbda27392.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://96a9e3af-f0c3-4048-9e6c-0ad8da3c6018.filesusr.com/ugd/15d534_b4bac92b8fc54b989b893f55538317a0.pdf?index=trueIn PDF document text
    • https://237a2310-9536-43ad-add1-fe73b840a51a.filesusr.com/ugd/8b319d_89b29d788f6944148666feb90861c957.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/savifin/23334323677.pdfIn PDF document text
    • https://s3.amazonaws.com/punagilelabon/45039279958.pdfIn PDF document text
    • https://s3.amazonaws.com/sojenozap/infographic_report_card.pdfIn PDF document text
    • https://s3.amazonaws.com/povelenavuviw/kuzoniwidi.pdfIn PDF document text
    • https://636e06b3-920c-4898-b827-ef778bbbc101.filesusr.com/ugd/40512e_2b91749fe3f14a4fb6487bea37688579.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/siwixomudit/authorization_letter_template_philippines.pdfIn PDF document text
    • https://8d90b851-447f-4cfc-ac95-1e867b71b983.filesusr.com/ugd/b371d9_f62ef8c570084adf91796a1166aebe94.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gixawetopoli/zaxetoxagizasimip.pdfIn PDF document text
    • https://s3.amazonaws.com/sumesawoxajew/60161189682.pdfIn PDF document text
    • https://be1d055c-b83b-422e-9e68-1bf13cef350c.filesusr.com/ugd/5b1e3c_b0745f4d5afc4c0fa6905b9caec02469.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_off000125ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125AE 5044 bytes
SHA-256: 6af023b819bdad37e567ae216bed75f529e7e7f905127aff0ad417b0f2a798fa
font_01_sfnt_off000136d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x136D5 11444 bytes
SHA-256: aa191a0c5142b642d8303d0b51497fe0330be90dbfe6241c7342b01eff5a69a3

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