Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2737d2999b834c2…

MALICIOUS

PDF

87.9 KB Created: 2021-03-18 01:22:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 7bf33bcdca870c286ffce5b8fd25a0ae SHA-1: 0e5f6a1bf5b48c99b411baf639353550e457a5ab SHA-256: d2737d2999b834c260be36076cf0afd54447cf0173ee71847a77a54abf5dd05e
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious sites. The presence of a ClamAV detection for 'Pdf.Phishing.Trojan' and ML classification further supports its malicious nature. The document body, though partially corrupted, contains a search query about cancelling a subscription, indicating a phishing or scam lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://golowaki.ru/strik?utm_term=how+do+i+cancel+my+lumin+subscription PDF link annotation
    • https://cdn.sqhk.co/durotula/olij7jc/roxezupirenupomepo.pdfIn PDF document text
    • https://cdn.sqhk.co/godajaxox/Lgg4oib/total_war_three_kingdoms_gongsun_zan_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/jolodovi/jihhHjj/puwidujitopoxon.pdfIn PDF document text
    • https://filavemegu.weebly.com/uploads/1/3/4/8/134883773/jejasepiremutilex.pdfIn PDF document text
    • https://cdn.sqhk.co/xodokopav/mOhXOkw/92448516067.pdfIn PDF document text
    • https://karoxenerom.weebly.com/uploads/1/3/0/7/130739074/d6883fafdf3.pdfIn PDF document text
    • http://qrettalq.online/ant_colony_games_mobilewhull.pdfIn PDF document text
    • https://cdn.sqhk.co/dutaxato/J5tvzij/xovovopirawulojoduno.pdfIn PDF document text
    • https://cdn.sqhk.co/mekibekowufe/WG0XHgg/86341225801.pdfIn PDF document text
    • http://svoylend.xyz/banting_diet_recipesxqs3o.pdfIn PDF document text
    • https://cdn.sqhk.co/wafudovop/2jfXicG/vikings_spin_off_series_valhalla.pdfIn PDF document text
    • https://kapizufon.weebly.com/uploads/1/3/4/4/134486886/1453613.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470826/normal_5fc7505ad073d.pdfIn PDF document text
    • http://aydym.club/hamlet_no_fear_shakespearexvuoo.pdfIn PDF document text
    • https://cdn.sqhk.co/bidogefapo/DdgRghc/rakilux.pdfIn PDF document text
    • https://jevamupoledi.weebly.com/uploads/1/3/4/7/134712268/zitemivolometa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372681/normal_6037eee07a2ea.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/dezajok/lab_equipment_worksheet_word_search_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/wibedubosateg/56968634566.pdfIn PDF document text
    • https://s3.amazonaws.com/fosalizuzu/79115330673.pdfIn PDF document text
    • https://s3.amazonaws.com/tozaduliwubega/kyrie_irving_injury_report.pdfIn PDF document text
    • https://s3.amazonaws.com/tobobowu/narasimha_reddy_audio_songs_telugu.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010d83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D83 5512 bytes
SHA-256: 2188fd66b8018adf3e0f6b280f8876b20cf47cef4d790bb494720f1d2f708c91
font_01_sfnt_off00012031.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12031 1832 bytes
SHA-256: 886313929a2a840396a9efe1236b0f91371ac8de8ce80438e8dc898f1383658c
font_02_sfnt_off00012931.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12931 11456 bytes
SHA-256: 21cc748e04f1690a5301e49dc826a03f72875e1dde9c01e26676ef6f2be143f4