Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3b4813088337908…

MALICIOUS

PDF

86.9 KB Created: 2021-03-15 00:53:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 264d6b64ddd1ba3fc20137cda24b40d6 SHA-1: 22091cef57d0ac115484bd76d2fbb507e87aac71 SHA-256: b3b4813088337908311fa508ef1345d51dd635fe60dfa3b543bbc460bdd8b1f3
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-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://baarspo.ru/wix?keyword=no+cable+tv+guide+shawnee+ok PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4478687/normal_5fe2d80aa229b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423133/normal_5fd6568952160.pdfIn PDF document text
    • https://cdn.sqhk.co/bogovureg/Mjdjbgj/best_action_hollywood_movies_2018_list.pdfIn PDF document text
    • https://cdn.sqhk.co/takabalal/cHsdhcO/tom_runyan_football.pdfIn PDF document text
    • https://cdn.sqhk.co/salavogi/gcgfpNr/43031049145.pdfIn PDF document text
    • https://cdn.sqhk.co/kafufojugure/jfPtd8n/bug_s_life_hopper_speech.pdfIn PDF document text
    • http://jikusofare.mywebcommunity.org/2014_jeep_cherokee_owners_manual.pdfIn PDF document text
    • https://cdn.sqhk.co/sisadenev/WJtj2hb/4_pics_1_word_letters_4_daily_puzzle.pdfIn PDF document text
    • http://fakurivevid.scienceontheweb.net/86869783373.pdfIn PDF document text
    • https://cdn.sqhk.co/domonuxasi/dvFjacE/52020803674.pdfIn PDF document text
    • https://cdn.sqhk.co/matajikiwov/WhigcGg/motocross_racing_gear_brands.pdfIn PDF document text
    • http://zonojebiridizo.mywebcommunity.org/vupenetika.pdfIn PDF document text
    • http://tofoxewesaxizuz.mywebcommunity.org/75308102865.pdfIn PDF document text
    • https://cdn.sqhk.co/kapidibewomu/yhgaVid/50458521531.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4492871/normal_5fece6158e34b.pdfIn PDF document text
    • https://cdn.sqhk.co/vejuwami/7iezMjc/app_inventor_2_ios.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/mejigavukolu/java_swing_components.pdfIn PDF document text
    • https://s3.amazonaws.com/daxemo/kikizoduzefipopoviwuk.pdfIn PDF document text
    • http://zudupaxub.myartsonline.com/rocket_stove_combustion_chamber_design.pdfIn PDF document text
    • https://s3.amazonaws.com/rimejiguvif/buy_deep_sided_sheets.pdfIn PDF document text
    • http://xovefopu.myartsonline.com/ielts_general_reading_practice_test_idp.pdfIn PDF document text
    • http://vefodipox.myartsonline.com/60522423867.pdfIn PDF document text
    • http://pasifowon.atwebpages.com/axis_bank_car_loan_application_form.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_off00011517.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11517 5428 bytes
SHA-256: 8085656ed53fbe0daeaf3e8fd64c3a154dbe4288e83bbf899097d3a948d3b9ca
font_01_sfnt_off000127a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127A5 11508 bytes
SHA-256: 79ba7cb83168f7cd70f2c49ea911716ded186e0e7ae9091a59ab196e13da89e9

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