Malicious PDF — malware analysis report

Static analysis result for SHA-256 c678e1f632dc9ded…

MALICIOUS

PDF

84.9 KB Created: 2021-03-29 02:26:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 4d19d943aefdbb7927d6e7c73a2087cf SHA-1: e233d9bb4e2795e974fd1815dd3a188ad5b4d4c0 SHA-256: c678e1f632dc9ded1400f194445e7450026029802001480f410583471b6274e4
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 0.9993

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://leonvi.ru/strik?utm_term=warhammer+40k+books+download PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4499285/normal_602af08348ef6.pdfIn PDF document text
    • https://cdn.sqhk.co/taduzotul/jfhaGic/51917320262.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393016/normal_60232c4f888e0.pdfIn PDF document text
    • https://cdn.sqhk.co/seseniluvus/Twgicib/ligizafazuf.pdfIn PDF document text
    • https://cdn.sqhk.co/ruwonumatag/gejaijw/24518363002.pdfIn PDF document text
    • https://cdn.sqhk.co/batumozi/7jbkMja/81661070759.pdfIn PDF document text
    • https://cdn.sqhk.co/nimawabej/VUiggc2/bahubali_2_movie_300mb.pdfIn PDF document text
    • https://cdn.sqhk.co/letarezetap/jjgcjiX/bluestacks_hd_app_player.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479212/normal_603c2501cf101.pdfIn PDF document text
    • http://rubeatyshop.xyz/84779084406kp3lc.pdfIn PDF document text
    • https://cdn.sqhk.co/wibafozadil/dBhbjf5/how_to_iron_polyester_cotton_blend.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381287/normal_605b8dd64a796.pdfIn PDF document text
    • https://cdn.sqhk.co/tefulobesa/3CSPUji/buzuxipivezukuzolononugev.pdfIn PDF document text
    • http://pirewixuzejetin.iblogger.org/american_lottery_2021_registration_form.pdfIn PDF document text
    • https://cdn.sqhk.co/kupovite/ijgUHhe/76035637207.pdfIn PDF document text
    • https://cdn.sqhk.co/ravawiku/VG6BLxg/62147983639.pdfIn PDF document text
    • https://cdn.sqhk.co/letarezetap/CKsihKb/40504930244.pdfIn PDF document text
    • http://copyrighytsupport.com/how_many_calories_should_i_burn_in_30_minuteszyhg5.pdfIn PDF document text
    • https://cdn.sqhk.co/rifusofuwedi/iDxIjf1/zijedoto.pdfIn PDF document text
    • https://cdn.sqhk.co/puzokopu/Wjfhdhd/69098491597.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459917/normal_604d073fcdf94.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://maguval.epizy.com/1st_year_biology_book_kpk.pdfIn PDF document text
    • http://najorenowodume.epizy.com/attagasam_full_movie_hd_free.pdfIn PDF document text
    • http://xovipofeguz.epizy.com/spectra_s2_breast_pump_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_off00010dd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DD4 5604 bytes
SHA-256: 67d62374784e8df388f87d8f0d1d67d5f376683c53b8b75c883849b12c830b10
font_01_sfnt_off000120cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120CB 10888 bytes
SHA-256: 31c82be3bffe44294cc2e6d9659346db5fe322f5b81adab6a226b3a00a59d769

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