Malicious PDF — malware analysis report

Static analysis result for SHA-256 0db12ddf824b5932…

MALICIOUS

PDF

87.6 KB Created: 2021-03-16 13:02:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: ab073482a98dd4f6ce279d784b9e9f65 SHA-1: 59d699993739778dadf250757ffa53b835ec4250 SHA-256: 0db12ddf824b593218107c9f3cd2ec5d863c823eccbe560f4e9c12b6830e2843
126 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, with multiple heuristics indicating it's a link farm on disposable hosting. The embedded URLs and the document body, despite being heavily obfuscated, suggest an attempt to redirect users to external sites. The primary attack pattern involves directing users to potentially malicious websites, likely for phishing or further malware delivery.

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://soxebez.ru/award?keyword=bible+meaning+of+numbers+pdf PDF link annotation
    • https://cdn.sqhk.co/wesifarajaru/hj8E1ii/solitaire_domino_games_rules.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389599/normal_6009673146120.pdfIn PDF document text
    • http://silekutum.medianewsonline.com/vipevugajusixujogogipaxo.pdfIn PDF document text
    • https://cdn.sqhk.co/xugavizira/aykiaGC/best_ringtone_2019_download_iphone.pdfIn PDF document text
    • https://cdn.sqhk.co/mikevoponage/ieqhajg/48418965811.pdfIn PDF document text
    • http://olivamebel.com/11503912476bx28m.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425255/normal_5ff294c060c75.pdfIn PDF document text
    • http://snapchat-alert.com/74469306649daukb.pdfIn PDF document text
    • http://aarbuz.space/income_guidelines_for_medical_card_in_illinoiscf3jh.pdfIn PDF document text
    • http://bimonetejatoleb.mygamesonline.org/chole_bhature_recipe_in_marathi.pdfIn PDF document text
    • http://zipafaxelati.sportsontheweb.net/61799667611.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/bec072dc-92d1-405c-be60-9ccb563fa86d/zonavufatogamik.pdfIn PDF document text
    • https://97e6e6c8-040d-427c-ad66-6ef02350ae38.filesusr.com/ugd/9c523c_4450de60c84e4bb3a1ddacf8b0c040c1.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf339ec8-ca80-4e8d-85e5-96e016cb29d3/46170112379.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/70437034-b1e0-42e6-8e9e-fc1bb0fbcb8c/mokulegurugidafugalejeri.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/570f3eaf-87c6-44f4-a62b-e3875f3f76c1/the_apocryphal_gospels_a_very_short_introduction.pdfIn PDF document text
    • https://f84ffea9-2755-49c2-9cb5-47ca8b55fe65.filesusr.com/ugd/0adedf_a16045653f9f4db58c8bbab65c99ed47.pdf?index=trueIn PDF document text
    • https://80172413-d145-4b71-b7cf-4a007d76ad29.filesusr.com/ugd/cacfd7_bf4438852bc444c8a34dd56fb3fc9f3c.pdf?index=trueIn 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_off000115ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115AD 5552 bytes
SHA-256: b7a4c3f7bb514e2d1186254d9bb0da7754a408945d6a5a3d648d3858bebb20c3
font_01_sfnt_off00012874.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12874 12116 bytes
SHA-256: 96f94508c690ebc505de7e8f683aaee3448686b68f5fb80b5a20e416ad5075aa

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