Malicious PDF — malware analysis report

Static analysis result for SHA-256 d422dc14485f1d56…

MALICIOUS

PDF

80.7 KB Created: 2021-01-24 06:01:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 1c0a1081bf1d41fa90bf2e9d28d4b2db SHA-1: e983e59bf8911bbc9d113231a1d52a2fadf7eb5c SHA-256: d422dc14485f1d5647eb234bdd6c7b578a7bfe9bad364d288dcb41a1ecce2cf5
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The sample is a PDF file identified as malicious by ClamAV and an ML classifier. It contains a large number of external links, many hosted on disposable domains like Weebly, indicating a link farm or phishing lure. The presence of 'utm_term' parameters suggests tracking or redirection, common in phishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 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://trafftec.ru/123?utm_term=shirley+ardell+mason+biography PDF link annotation
    • https://bavopasivivewid.weebly.com/uploads/1/3/0/7/130738836/20146d4c4594da0.pdfIn PDF document text
    • https://rupanusevufow.weebly.com/uploads/1/3/1/3/131380126/9739734.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386595/normal_600552ef0b570.pdfIn PDF document text
    • https://munuteme.weebly.com/uploads/1/3/4/8/134862418/rizojopazeni.pdfIn PDF document text
    • http://pumujavebedopa.iblogger.org/ctv_news_reporters_edmonton.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486548/normal_5fed5e7545097.pdfIn PDF document text
    • https://jobifavizatop.weebly.com/uploads/1/3/4/1/134108852/zowavojusuma-nuzuwamigifip-tenef.pdfIn PDF document text
    • https://sevafigetof.weebly.com/uploads/1/3/4/9/134902911/1b8372.pdfIn PDF document text
    • http://kadesevi.iblogger.org/sticker_store_for_facebook_free.pdfIn PDF document text
    • https://najunewuzerus.weebly.com/uploads/1/3/1/4/131408250/beleg.pdfIn PDF document text
    • https://limifotediko.weebly.com/uploads/1/3/5/3/135325738/jopotifozexil.pdfIn PDF document text
    • https://zefowumuf.weebly.com/uploads/1/3/5/3/135327275/4422611.pdfIn PDF document text
    • http://zumubexupon.22web.org/alien_vs_predator_requiem_game.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kefujaforu.rf.gd/70898755906.pdfIn PDF document text
    • https://s3.amazonaws.com/sowewazulejewi/my_garden_answers_app_for_android.pdfIn PDF document text
    • http://bividit.rf.gd/motonufakudojifepuj.pdfIn PDF document text
    • http://rilenipavow.rf.gd/calculations_meme_template.pdfIn PDF document text
    • https://s3.amazonaws.com/rodiligarexo/simple_english_learning_books.pdfIn PDF document text
    • http://fobuzepiru.epizy.com/24878771475.pdfIn PDF document text
    • https://s3.amazonaws.com/rutufokedizon/online_black_and_white_converter.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_off0000fc22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC22 5716 bytes
SHA-256: b69648327a75500491eb03b365db753c9ff58020a4acf585b9e48cde1f25ec57
font_01_sfnt_off00010f6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F6C 10624 bytes
SHA-256: 2085168dde9235e0b4f143f76d37210c16d63d0df60b908835f6d4b68d02b2ec

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