Malicious PDF — malware analysis report

Static analysis result for SHA-256 90f042adff29643e…

MALICIOUS

PDF

80.9 KB Created: 2021-04-30 20:48:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 4cb68bd2875f299f4a5f545e4d3ae5f9 SHA-1: 1bf502495b1a7a55b21c7b6fbb81a311c55089fc SHA-256: 90f042adff29643e20ec922d92eeea73162959652cbb58c0e5eed1079c054562
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 0.9990

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://dugedepap.ru/strik?utm_term=the+wheel+of+time+amazon+tv PDF link annotation
    • http://mybiol.site/do_homemade_bug_sprays_workeo059.pdfIn PDF document text
    • http://3bki.ru/13152321319k6l82.pdfIn PDF document text
    • https://begagezegitajaj.weebly.com/uploads/1/3/1/3/131398046/panoxaxevikudef_vegepuku_joxenagasa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407782/normal_5fee94aa16bbe.pdfIn PDF document text
    • https://zebidomixivo.weebly.com/uploads/1/3/4/3/134326720/nefapagag-reserupidojis-giledo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406775/normal_6018eab6c3a50.pdfIn PDF document text
    • https://duzopuxezofuj.weebly.com/uploads/1/3/1/3/131382696/9311199.pdfIn PDF document text
    • http://momentikshop.space/alchemist_code_temptation_guide6fv2k.pdfIn PDF document text
    • https://zogetomobosuzo.weebly.com/uploads/1/3/4/7/134741576/4e10aa9f67e5d.pdfIn PDF document text
    • http://ch-data-2a8fv9s.pw/867505797814ojxu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471710/normal_601ffdbbd7bdb.pdfIn PDF document text
    • http://olx-delivery.cc/59215893361j6f3p.pdfIn PDF document text
    • http://wusazododapir.iblogger.org/37292633485.pdfIn PDF document text
    • http://inscarusa.info/xebuzoxakisuzwnz4q.pdfIn PDF document text
    • http://mastericy-chistoty.ru/lufaxipinifadaba7w7dv.pdfIn PDF document text
    • http://clubstore.pro/standard_affidavit_as_per_annexure_etees4.pdfIn PDF document text
    • http://help-business-media.com/80939796710bliyw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jipuzekas.rf.gd/answer_for_have_you_been.pdfIn PDF document text
    • http://keputeka.epizy.com/68157121268.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b4598bf-bae9-490e-9b3e-a2eba025cb17/69620232902.pdfIn PDF document text
    • http://dukowiniwamew.rf.gd/abdominal_muscle_exercises.pdfIn PDF document text
    • http://milizirasidemib.epizy.com/javerafof.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/65a60834-527a-4ad9-832d-30ad62b06e9f/un_mundo_feliz_serie_imdb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb6a98aa-6c75-4b15-8f07-96beeea8448b/41828991857.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad8c2c77-edd0-4618-bc05-b47aa37132eb/tajagaxaxejolosefoke.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_off0000fde4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDE4 4884 bytes
SHA-256: eaaa2de8e193f3b6a64c71a3ed54e6a5e3919405636f98664c58b37bec36e100
font_01_sfnt_off00010e7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E7D 11756 bytes
SHA-256: f2cb1580ae591704d541ade9b60cd7cf2cfb0bd313dbae0c0b9b5dad99d52e6e

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