Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1495eaa7359257c…

MALICIOUS

PDF

72.0 KB Created: 2021-03-27 18:23:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 33108240e826f8b749b2b290970f2461 SHA-1: 7197e983a234414e8398a30417c223fd60c4a307 SHA-256: b1495eaa7359257c223df5907b9c26f49017d3b2256a376fe530a4ce27e48980
126 Risk Score

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 0.9995

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://jumiwimov.ru/award?keyword=assertividade+livro+pdf PDF link annotation
    • http://xbet1.fun/rainbow_study_biblez2nwz.pdfIn PDF document text
    • http://greatholl.com/lakanivagufujogasadp9i3t.pdfIn PDF document text
    • http://hookup750.website/after_livro_2_onlineo03ou.pdfIn PDF document text
    • https://cdn.sqhk.co/bovutolomevo/chUTidS/ezpay_login_singapore.pdfIn PDF document text
    • http://jukexufepezaj.22web.org/woxejuserobidujar.pdfIn PDF document text
    • http://momivegod.22web.org/9th_standard_tamil_konar_guide_2019.pdfIn PDF document text
    • https://cdn.sqhk.co/dapalufited/b0Tbbys/among_us_notes_program.pdfIn PDF document text
    • https://wedazosalewe.weebly.com/uploads/1/3/5/3/135337368/fisiri.pdfIn PDF document text
    • http://nosinoski.shop/sofewumezagadelipijugs08g.pdfIn PDF document text
    • http://momentikshop.space/85405673008rp4za.pdfIn PDF document text
    • https://mepagalupotope.weebly.com/uploads/1/3/4/2/134265457/a9aae3851e74c.pdfIn PDF document text
    • http://3203epworthcres.com/what_are_the_3_main_questions_in_economicsp5pnf.pdfIn PDF document text
    • http://pimesizawox.sportsontheweb.net/why_do_smoke_alarms_go_off_if_there_is_no_fire.pdfIn PDF document text
    • http://erethiztzj.space/43162381576ircwr.pdfIn PDF document text
    • https://cdn.sqhk.co/naliwanik/hhf7Ior/retro_arcade_games_machine.pdfIn PDF document text
    • https://cdn.sqhk.co/kerikone/ggepDjf/xigupaxakazojomima.pdfIn PDF document text
    • http://zinefikitozozeg.sportsontheweb.net/aptitude_questions_and_answers_with_explanation_in_tamil.pdfIn PDF document text
    • https://gojamomajaso.weebly.com/uploads/1/3/4/6/134616238/mitoza_pubozagazofa_bomawaja_kuxaruvepin.pdfIn PDF document text
    • https://bibomezu.weebly.com/uploads/1/3/2/7/132710601/8208328.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zuvineduwofuxo.epizy.com/xetikulefuzotenolagudi.pdfIn PDF document text
    • http://sazosubegus.epizy.com/73308480934.pdfIn PDF document text
    • http://jigufabusu.epizy.com/buick_regal_2012_manual.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_off0000d6b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6B2 5084 bytes
SHA-256: d37d1668c59c647ebc5eb60c28f01740a2ed66224c50cc9f3b340b145f9d42f1
font_01_sfnt_off0000e813.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE813 13588 bytes
SHA-256: 5422d8861676f2e2e75b4921410ffb3ad7b2dfdb60056c047dbd511a7182ebca

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