Malicious PDF — malware analysis report

Static analysis result for SHA-256 01efae22fd80235f…

MALICIOUS

PDF

76.6 KB Created: 2021-02-25 06:09:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: c01b912f98b3763add25809fb1121e86 SHA-1: 627b57b44ef24f0929d6ca2e2d7e9f05c1ef55c5 SHA-256: 01efae22fd80235ff6d79c5b11b6d8b82a6b783ed99832cba7e189834b5a06e5
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF document contains multiple embedded URLs and is flagged by ClamAV as a phishing trojan. The ML classifier also strongly indicates maliciousness. The document body, though heavily obfuscated, contains keywords related to a 'Kitchenaid stand mixer sale', suggesting a phishing lure to drive traffic to malicious sites. The presence of numerous links, including those on disposable hosting, further supports a link-farming or phishing campaign.

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://jottigo.ru/award?keyword=kitchenaid+stand+mixer+sale+target PDF link annotation
    • https://zidivopopa.weebly.com/uploads/1/3/4/3/134373798/damoramabilobina.pdfIn PDF document text
    • http://komamoj.22web.org/40506765612.pdfIn PDF document text
    • https://gadufekovofu.weebly.com/uploads/1/3/4/7/134764592/fimozirusaze.pdfIn PDF document text
    • https://cdn.sqhk.co/jivazufevi/hdBgjjd/69720046395.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471253/normal_602f6c927d593.pdfIn PDF document text
    • https://cdn.sqhk.co/tatidukigag/shXWlhg/environment_incident_report.pdfIn PDF document text
    • http://terugate.mypressonline.com/does_the_kitchenaid_mixer_have_a_food_processor_attachment.pdfIn PDF document text
    • http://lunesygets.xyz/what_is_the_main_purpose_of_the_invisible_primarysjnfo.pdfIn PDF document text
    • http://raxejudesezix.scienceontheweb.net/modal_verbs_meaning_and_examples.pdfIn PDF document text
    • https://cdn.sqhk.co/fipimomozuk/r8Fibhj/terro_ant_killer_liquid_ant_baits_home_depot.pdfIn PDF document text
    • https://cdn.sqhk.co/jowowibow/jehig3a/hashtags_for_instagram_reels_video.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://litaxuroba.rf.gd/java_string_format_float_rounding.pdfIn PDF document text
    • http://jenigaseze.epizy.com/willpower_baumeister.pdfIn PDF document text
    • http://jilemizofi.epizy.com/disco_bhangra_remix_song.pdfIn PDF document text
    • http://wivowutone.epizy.com/edtpa_lesson_plan_template_ny.pdfIn PDF document text
    • http://litorow.myartsonline.com/91737557380.pdfIn PDF document text
    • http://jokosen.atwebpages.com/5638522036.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_off0000edb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDB7 5392 bytes
SHA-256: 599ea8f3323bc1e4a5d4478167b6041a125d59dc4a5aa364fcdfd1fefb206077
font_01_sfnt_off0000ffea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFEA 10872 bytes
SHA-256: 5449b90a12e29ba38aba17590f3903331c422d12ba718516d9f3859a250c5679

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