Malicious PDF — malware analysis report

Static analysis result for SHA-256 959504cc2ac0085a…

MALICIOUS

PDF

81.5 KB Created: 2021-04-01 16:16:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 0370f3353f521dac5496312038a279e0 SHA-1: fecb3252754ac4d4797311a087d87823b10b5a84 SHA-256: 959504cc2ac0085a5a839368987f10f157bb465c5f011183bcd66224cb180c99
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9997

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 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://fokemale.ru/wix?keyword=houghton+mifflin+harcourt+publishing+company+answer+key+grade+4 PDF link annotation
    • http://mpvideo.org/59024628106x1fvn.pdfIn PDF document text
    • http://xavelodezazil.iblogger.org/amumu_jgl_guide_s9.pdfIn PDF document text
    • http://rafale.store/16815133057goxw1.pdfIn PDF document text
    • http://tur8osale.site/563128640024exb2.pdfIn PDF document text
    • http://kartaidatodemeleri.com/357055423566lwjv.pdfIn PDF document text
    • http://tevereze.22web.org/jajexobidakoduvudizotex.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409607/normal_6007d4e05499f.pdfIn PDF document text
    • https://nokajavu.weebly.com/uploads/1/3/0/9/130969653/gifowi.pdfIn PDF document text
    • https://cdn.sqhk.co/vateviti/ujbihhb/98315632663.pdfIn PDF document text
    • https://cdn.sqhk.co/putomikoluku/MZjjhir/zomijipusepudisuw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369775/normal_6021efdb4d86d.pdfIn PDF document text
    • https://bebilakag.weebly.com/uploads/1/3/0/7/130776425/repebedokapipotela.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460048/normal_603b7ddfbbbcc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408483/normal_60543bd3f2989.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://441dbedc-201a-49d7-bb2a-292980023e2b.filesusr.com/ugd/473728_49a5a9b8e2694c5b8e21de60898c7d88.pdf?index=trueIn PDF document text
    • http://jefedajuwefafi.rf.gd/gaspard_de_la_nuit_ondine.pdfIn PDF document text
    • https://86146b48-cf95-488a-b5a0-22832f4589a6.filesusr.com/ugd/3b4eee_b078d5d02b924065ad282eb6dc9a9efb.pdf?index=trueIn PDF document text
    • https://b7f5b04e-b247-49a4-9dc0-39f0c843ec09.filesusr.com/ugd/b56f86_f9c3cc95050b4e558a29c1c97a79b27c.pdf?index=trueIn PDF document text
    • http://dajaxul.epizy.com/jadifuza.pdfIn PDF document text
    • https://f07eb630-23ff-4298-a1df-d7940f1ba2dc.filesusr.com/ugd/097a5b_234844a4fb6a41909b21cd6d32b20cb5.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_off0000ff81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF81 6016 bytes
SHA-256: bdc4972c650f79bb9b8bd0888980fe83bbfb28e9d3ac1dff3331a34aae70dde6
font_01_sfnt_off000113e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113E7 10764 bytes
SHA-256: 07931d97f2b00d0628ac08f1d9402c6ecc78d06797fda01782d7c7779dda2ee5

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