Malicious PDF — malware analysis report

Static analysis result for SHA-256 8219a453bc50401f…

MALICIOUS

PDF

76.1 KB Created: 2021-03-11 05:12:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 38dcf9bda5af5499ed2528b837890314 SHA-1: 11abb572031e8061968a34fbe947c124bfb0100b SHA-256: 8219a453bc50401f268cf1cfad94f1b7cc0ccbbe212c0d52d7148264014610f4
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://botokaw.ru/123?utm_term=awards+and+honours+2018-+19+pdf PDF link annotation
    • http://pihodze.com/words_that_start_with_semi_8_letters421wl.pdfIn PDF document text
    • https://cdn.sqhk.co/vorebilifi/gjfhajd/e_news_cast_2019.pdfIn PDF document text
    • https://cdn.sqhk.co/vipujitebiki/kEhhidN/media_markt_gutscheine_im_saturn_einlosen.pdfIn PDF document text
    • https://cdn.sqhk.co/jogepirar/Yuf0CVE/emergency_veterinary_services.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459163/normal_5fca66a91a136.pdfIn PDF document text
    • http://tcerkovniekupola.space/napezawuny8gfs.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420235/normal_60068d702e5b0.pdfIn PDF document text
    • http://dagomakiluje.iblogger.org/baby_boss_movie.pdfIn PDF document text
    • https://cdn.sqhk.co/zibavuna/jijj54z/my_talking_cat_games.pdfIn PDF document text
    • http://difexolexakax.22web.org/marumamekodizi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vigamoburijom.rf.gd/gejep.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e56676b-d521-4267-99cb-f89ff215917d/mokujuvedutipemifinelewaz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc9c0e98-e682-4e2e-befe-b98329d938e2/english_idioms_and_idiomatic_expressions.pdfIn PDF document text
    • http://fevedudebe.epizy.com/accident_prevention_and_crisis_management.pdfIn PDF document text
    • http://renabije.rf.gd/why_does_hp_laserjet_keep_going_offline.pdfIn PDF document text
    • http://roroturazukixij.epizy.com/tabotera.pdfIn PDF document text
    • http://bidovug.rf.gd/dt466e_engine_hp.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf81c913-d9ae-47ce-9487-5d99510a45e6/interactive_hundreds_chart_missing_numbers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f056121-e002-4371-bf08-824dc555569e/para_que_sirve_el_jengibre_con_canela_y_laurel.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_off0000eb7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB7E 5888 bytes
SHA-256: fa884dca415fb9805d9de7835afedd7c1e8e9311c6ee3386fc175a95f9254b55
font_01_sfnt_off0000ff9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF9C 10596 bytes
SHA-256: 3937edfad0b525f937233d80ac91820248e97ca42772e94e42146cfb30b7df5f

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