Malicious PDF — malware analysis report

Static analysis result for SHA-256 5bf1def7064cf0f0…

MALICIOUS

PDF

88.7 KB Created: 2021-03-01 18:57:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 01866fb743c48940550bb1c2d5d39108 SHA-1: dd865ecbde57169685e1ecd0b05ae07754295172 SHA-256: 5bf1def7064cf0f0fbfe3fe8637808fdac70f64a519ed51a3939515da880d41c
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-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://lozipotod.ru/123?utm_term=panasonic+dvd-s700eg-k+dvd-player+hdmi+scart PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4369161/normal_5ffadf6a188b7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393625/normal_5ffefcc8771ce.pdfIn PDF document text
    • https://cdn.sqhk.co/mugegiduveb/jb9hhyg/voice_wiki_tv.pdfIn PDF document text
    • https://cdn.sqhk.co/kojetovukufo/h95hcxm/fury_road_survivor_apk_mod.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467278/normal_5fde38b359465.pdfIn PDF document text
    • http://stankoff.org/fupobaxujetej7hr79.pdfIn PDF document text
    • https://cdn.sqhk.co/kowumutajaw/Ggiieij/gebubiperomekavuta.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368250/normal_5fe9f11d78d83.pdfIn PDF document text
    • https://cdn.sqhk.co/vugomupuzisa/7QUge5m/jokuvakukivuj.pdfIn PDF document text
    • http://bristol-yalta.run/lixolewosofikedojizurt89sg.pdfIn PDF document text
    • http://topsale.pro/xomubupudideji5gxjk.pdfIn PDF document text
    • http://bella24.xyz/livestrong_ls8.0e_ellipticald0vyp.pdfIn PDF document text
    • https://cdn.sqhk.co/libodinidep/bii2wt9/animal_restaurant_game_little_fox_diary_2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://foxadawimuwewar.epizy.com/58658818591.pdfIn PDF document text
    • https://s3.amazonaws.com/magapeguwabe/neet_books_free.pdfIn PDF document text
    • http://zesafemumibow.myartsonline.com/o_diagrama_de_fases_da_gua_representado_abaixo.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011869.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11869 5968 bytes
SHA-256: 81a759275ac571557255c0735e3541219694078dc839991cad702558e78b1901
font_01_sfnt_off00012cb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CB0 12096 bytes
SHA-256: 5f20fc285c11b8a96f8401c55a45a384dc9b3e79e56553c551695aaa75a7cc32

Open this report in the interactive analyzer, or submit your own file for analysis.