Malicious PDF — malware analysis report

Static analysis result for SHA-256 5149c163c72df251…

MALICIOUS

PDF

90.5 KB Created: 2021-03-08 04:44:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: b1454de0cff9e708b2b9b164e93bb14a SHA-1: aab5d3f31e3e0879e0509ccbf0cf0f63a863a349 SHA-256: 5149c163c72df251518651d56e3f108968c4ba32578ff0ef2146e0ddb4ea87c1
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 0.9998

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 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://ponafet.ru/wix?keyword=stx+turboforce+3000+series+manual PDF link annotation
    • http://duduzojezojak.22web.org/rutepe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462985/normal_5ffe6d6e1cfc1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408996/normal_603aea40e37a6.pdfIn PDF document text
    • http://narelarijejale.iblogger.org/solucionario_mecanica_vectorial_para_ingenieros_beer_johnston_8va_edicion.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366041/normal_5fdb7dd68b62b.pdfIn PDF document text
    • http://dmgameplan.com/vijolubajezilido5co2w.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485946/normal_6042e0dfafc62.pdfIn PDF document text
    • http://psylath.com/carport_plans1wi1r.pdfIn PDF document text
    • http://kernig.store/alan_watts_quotes_on_self_love754hg.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413468/normal_601910bcb46f0.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/lawakux/77800953633.pdfIn PDF document text
    • https://36071b1a-d853-4ad1-bccf-0ed894d94038.filesusr.com/ugd/906e9f_2c94123f45214f15b639f2f3ed04c75d.pdf?index=trueIn PDF document text
    • https://8d67285a-e3c5-4820-bb1a-bb91ce1079a6.filesusr.com/ugd/d54300_c53dcb8c793b4f7d92c6c0f9fcb1a8d9.pdf?index=trueIn PDF document text
    • https://63aa7d51-6c54-48cc-ac87-b710a0da19c3.filesusr.com/ugd/c8d394_b8318c2cd62c4dba8530d46643e1fdf7.pdf?index=trueIn PDF document text
    • http://nasakil.rf.gd/the_vampire_diaries_quotes_season_1.pdfIn PDF document text
    • http://wotofuwib.epizy.com/what_happens_if_a_country_breaks_international_law.pdfIn PDF document text
    • https://9579f988-9383-433c-acf3-5fff76e0c882.filesusr.com/ugd/191a6d_c36304dbb0f14c13b3717395137fdade.pdf?index=trueIn PDF document text
    • http://xoxozuzupa.rf.gd/hp_laserjet_p2055_parts_manual.pdfIn PDF document text
    • http://mufupif.rf.gd/14964556905.pdfIn PDF document text
    • https://s3.amazonaws.com/zesotat/ark_survival_evolved_digital_ps4.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://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_off00012499.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12499 5644 bytes
SHA-256: 0d51914b8fa7dc28150889be7a7f7631db4031c4802156a444c07730060cb9c4
font_01_sfnt_off000137bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137BB 11024 bytes
SHA-256: b553ca9298a7584d3785e08d5cdbcd726e39e5482c5910792f6cf74b042989f5

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