Malicious PDF — malware analysis report

Static analysis result for SHA-256 10c3c302e749cca9…

MALICIOUS

PDF

80.2 KB Created: 2021-05-10 03:42:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 84c71d9f085a4cfd0e1c462132ea41d6 SHA-1: df434884db0be4a49d31f62c6a3c728fbf883450 SHA-256: 10c3c302e749cca9f2d920adf2bda77772189cd1cae16e7fb05187288f917538
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://dugedepap.ru/strik?utm_term=fender+twin+reverb+reissue+review PDF link annotation
    • http://pekibexuvipeve.scienceontheweb.net/mental_ability_test_reviewer.pdfIn PDF document text
    • http://loduwij.scienceontheweb.net/ccna_security_210_260_exam_questions_and_answers.pdfIn PDF document text
    • http://fofumumitem.medianewsonline.com/katzung__trevors_pharmacology_examination_and_board_review_14th_edition_download.pdfIn PDF document text
    • http://pumexewutide.22web.org/can_priest_use_daggers.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368999/normal_601952a0af8d1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370270/normal_603249e3d612c.pdfIn PDF document text
    • http://vawurabel.mygamesonline.org/jenofuxebifuxus.pdfIn PDF document text
    • http://kesuvajeb.scienceontheweb.net/l_anti_oedipe_capitalisme_et_schizophrnie.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403121/normal_5fd33f90b9977.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/kozibowisenatu/fupibo.pdfIn PDF document text
    • http://nerezusilanake.atwebpages.com/bryant_programmable_thermostat_battery.pdfIn PDF document text
    • https://b18ac5c8-c825-4c59-a0a1-290c879ce4f6.filesusr.com/ugd/1a0fde_e0d0152db0b44eb09a6505a8ba50d97c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vekodupiwarobi/acronis_true_image_2016_deutsch.pdfIn PDF document text
    • https://s3.amazonaws.com/xujitezu/fojefakozelipen.pdfIn PDF document text
    • https://eaae50f7-3b1c-4f1b-9b3c-e2a48377569d.filesusr.com/ugd/b96e41_11c1f55acca640f28d28513e41a63244.pdf?index=trueIn PDF document text
    • https://80b1f93a-fe74-4439-a81d-34814fa7a505.filesusr.com/ugd/e56fe2_6c801c1cfe254b74b43fa9098572392e.pdf?index=trueIn PDF document text
    • https://84d5b3ab-51dd-4312-87b7-51df18fb3b26.filesusr.com/ugd/9ea9b6_deced0daae504cb58f953d2debf31335.pdf?index=trueIn PDF document text
    • http://gafijid.atwebpages.com/pemajo.pdfIn PDF document text
    • https://411563d6-f1a1-4768-9eaa-86e4eb1f1ae3.filesusr.com/ugd/6d8349_44a764b2eed4421abe8314cb90167afd.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sajatesawodiji/sajefubakeduxugegeduzo.pdfIn PDF document text
    • http://muvalinifotu.rf.gd/pidanumoxo.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_off0000f85a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF85A 4824 bytes
SHA-256: 6e93ca9fde5258ab75a831e804dca0e83734b2a9ffdf132540984bdae2aa713c
font_01_sfnt_off000108eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108EB 12504 bytes
SHA-256: da36c46435560b17cf09f53e206a42ef6e11426964d3b9517bd74b55a3ea131a

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