Malicious PDF — malware analysis report

Static analysis result for SHA-256 383478803568c96f…

MALICIOUS

PDF

85.9 KB Created: 2021-04-10 08:14:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: db0a40ebeab70cfb8ad88957bac5bfa5 SHA-1: aa22fa93ca568a17d690ea26e37b9aec3c88a74d SHA-256: 383478803568c96f91e8377b48b7103037e919483ced662c8e816b9983128b18
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 0.9994

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://kuzutuzo.ru/strik?utm_term=mastering+the+wyckoff+method+pdf PDF link annotation
    • https://cdn.sqhk.co/vefusujix/gi8uNid/58191135282.pdfIn PDF document text
    • https://cdn.sqhk.co/gukawaki/cgdAgfk/wallpaper_hd_apple_download.pdfIn PDF document text
    • https://cdn.sqhk.co/tosilura/Die7idr/34124345508.pdfIn PDF document text
    • http://fevajubinijexaz.iblogger.org/89547559298.pdfIn PDF document text
    • https://cdn.sqhk.co/tatidukigag/jb4ibUd/gsmarena_samsung_a71.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459939/normal_5ffea944b9ba5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457296/normal_6062a94f62012.pdfIn PDF document text
    • https://cdn.sqhk.co/kebokeregim/logjDhe/colonoscopy_screening_guidelines_after_polyp.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377905/normal_5ff1b848bbb4b.pdfIn PDF document text
    • https://cdn.sqhk.co/volixusej/FRcHjij/tijijazepu.pdfIn PDF document text
    • https://cdn.sqhk.co/tufuboloruj/JEJjjgh/85836007724.pdfIn PDF document text
    • https://cdn.sqhk.co/sibamoxa/ljYieyo/rituriwagixitez.pdfIn PDF document text
    • https://cdn.sqhk.co/gafisasiwu/lmhg9gf/tujitepemi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375204/normal_604e626264b56.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xerowavu.rf.gd/nudaxajizujifoxaxufavura.pdfIn PDF document text
    • http://witimalolikoji.rf.gd/74188015865.pdfIn PDF document text
    • http://jakunivejejaxo.rf.gd/39314207176.pdfIn PDF document text
    • http://newosanovaf.epizy.com/moneyskill_module_36_answers.pdfIn PDF document text
    • http://pogogap.epizy.com/zapuxipivejojofotusef.pdfIn PDF document text
    • http://rexufigifex.epizy.com/conductas_sexuales_anormales_en_la_infancia.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4463f42f-b5d8-4aa9-8425-afa7cc2d3db8/35024137836.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad5747fd-25ef-4a33-ba1e-2a38de74f696/849746611.pdfIn PDF document text
    • http://galapor.rf.gd/raberuvadefo.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_off00011195.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11195 5800 bytes
SHA-256: 64535cef9df30581b3b47dac83740770854568f23f0687353eae170e56ae1d0c
font_01_sfnt_off00012558.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12558 10824 bytes
SHA-256: 49a8a49d34ae31038dcebc07d29e8811cd2eb6cfc370fd0d1a3d9f974ce1b1d8

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