Malicious PDF — malware analysis report

Static analysis result for SHA-256 12acfb630945ffcd…

MALICIOUS

PDF

88.8 KB Created: 2021-03-15 09:54:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 3a087b20b501b73f627a57a2fa3fe3db SHA-1: 5ec9a628da0401e517cc37432f1e3967fc0bfb53 SHA-256: 12acfb630945ffcd5b6588ef4e34d474c5e693fc8a885c55a343557f0763a03b
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 0.9997

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://ponafet.ru/wix?keyword=desert+titan+ark PDF link annotation
    • http://metryck.info/kewonebelu4drsl.pdfIn PDF document text
    • http://canonsburglake.com/what_do_they_always_say_in_handmaids_talemycpq.pdfIn PDF document text
    • http://virona.org/what_makes_metaphors_different6qgbo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412173/normal_5fe0275bb7381.pdfIn PDF document text
    • http://nature-ital.space/chemistry_tools_names_and_usesj3noc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465249/normal_6031284908268.pdfIn PDF document text
    • http://playmarket-online.com/archer_season_11_finale_dateyd9c9.pdfIn PDF document text
    • http://vnds-super.space/yu_gi_oh_bakuralzm4g.pdfIn PDF document text
    • http://triple-doska3.club/leap_2025_practice_test8irpb.pdfIn PDF document text
    • http://hurleyshamburgers.com/anime_tv_apk_iphone1rsn1.pdfIn PDF document text
    • http://piredvizhnik.com/the_maze_runner_book_summary_shortpsn2r.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411498/normal_5ffb4fec009ea.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://wugujub.onlinewebshop.net/91118412633.pdfIn PDF document text
    • http://xofunuxemijowex.rf.gd/10375149685.pdfIn PDF document text
    • https://s3.amazonaws.com/kovozenamofox/becrypt_enterprise_manager_administration_guide.pdfIn PDF document text
    • http://tulifal.onlinewebshop.net/dagesifoxatoxu.pdfIn PDF document text
    • https://s3.amazonaws.com/rirusozo/west_african_mask_template.pdfIn PDF document text
    • http://muxajetolalet.epizy.com/bumblebee_vay_apk.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_off000113c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113C5 4388 bytes
SHA-256: dc1cacfcc67754c06fe3fc6ddaf6a1c98ca45aa0274fec0c2b6452f899ea4c34
font_01_sfnt_off000122a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122A9 11056 bytes
SHA-256: 9808910c8af0e7b26dc9ea8b5c3416cc79643ce7e8743241c19d17b8050f33f0
font_02_sfnt_off00014858.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14858 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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