Malicious PDF — malware analysis report

Static analysis result for SHA-256 d476c07f8c0d32f2…

MALICIOUS

PDF

74.9 KB Created: 2021-03-19 11:26:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 66a5b8beb97816f3e915a6e26ff15977 SHA-1: 732fae571b2a4872cd89d729d57b243216f8f3fb SHA-256: d476c07f8c0d32f2c0ea90613a507553475867d78c597c90f8a991a66479fd67
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://leonvi.ru/wix?keyword=root+tool+apk+for+android+6.0 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4491437/normal_602f8c0a7768e.pdfIn PDF document text
    • https://cdn.sqhk.co/rerunaropiz/GgcgeUJ/luguwadofonosir.pdfIn PDF document text
    • http://wavapivanuf.scienceontheweb.net/diwukefapowedubebusulonig.pdfIn PDF document text
    • https://cdn.sqhk.co/kabawamurelo/rFDKifV/mowuzimuvofazo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475577/normal_6005beb365bfe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385612/normal_5fed520af2afb.pdfIn PDF document text
    • https://cdn.sqhk.co/xupumekejaxa/DgjZHid/guess_the_movie_answers.pdfIn PDF document text
    • https://cdn.sqhk.co/noxutuvixi/htojaiP/kid_video_80_s_cartoon_songs.pdfIn PDF document text
    • https://cdn.sqhk.co/pufojoloz/Uhijfig/63561142820.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393916/normal_5fdff345f4234.pdfIn PDF document text
    • http://vurovolapoza.mygamesonline.org/cobra_29_lx_max_manual.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484814/normal_5ff525a2642e0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4428331/normal_602d3fad456bd.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://44f39d5c-a655-4437-91b6-62b11e148e71.filesusr.com/ugd/eb4c03_2e3c079045094bfa98e09f71abfd6e55.pdf?index=trueIn PDF document text
    • http://kisalonokexiwi.atwebpages.com/hp_laserjet_1012_toner_office_depot.pdfIn PDF document text
    • http://xovolefewawex.atwebpages.com/true_devotion_to_mary_st_louis_de_montfort_you_tube.pdfIn PDF document text
    • http://timojodabemisux.myartsonline.com/93615190462.pdfIn PDF document text
    • https://37523d11-79cf-4eb3-ada4-f05de57c71ee.filesusr.com/ugd/275374_fb8440a26fb547d18f4a30b228d59e7a.pdf?index=trueIn PDF document text
    • https://931f52e6-cb68-4a93-8e02-54808d33f8b6.filesusr.com/ugd/6290de_67bbb817b66f4692b0886ce5fc3a0f77.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 4

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_off0000e620.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE620 5256 bytes
SHA-256: c0d749f83a662e43a5133eee1380b141200801bba9c9637c9845413078ddf9ab
font_01_sfnt_off0000f81c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF81C 11320 bytes
SHA-256: 16736e1d5fa7d53c40c6f0697a4f33775c20f9a58b006a0f4620a00db085aca2

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