Malicious PDF — malware analysis report

Static analysis result for SHA-256 80e2de6d9279e35c…

MALICIOUS

PDF

70.7 KB Created: 2021-03-01 04:41:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: b1b69207b140462bd2a344eb050717d3 SHA-1: 63ff472deded41ed55a27ad8ec64bb81b13f51a2 SHA-256: 80e2de6d9279e35c6a2f965fb31775ca7e08abf84908f1029ef95e6665aacfc8
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to external domains, many of which are hosted on disposable or suspicious-looking domains. Heuristics indicate it's a link farm and ClamAV detected it as a phishing trojan. The ML classifier also flagged it as malicious with high confidence. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an intent to redirect users to malicious sites, likely for phishing or to download further payloads.

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://maypoin.ru/award?keyword=what+is+a+stacking+kit+for+a+washer+and+dryer PDF link annotation
    • http://siwosupegejolop.medianewsonline.com/xixap.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369904/normal_6021f39a2e0c0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391599/normal_5ffb69830b30f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388282/normal_5fefc7d177703.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443821/normal_602cda49062f9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387229/normal_6037a0f01b9b4.pdfIn PDF document text
    • http://vosajizegek.mypressonline.com/32651136988.pdfIn PDF document text
    • http://lofoporubatul.mygamesonline.org/the_gift_of_the_magi_worksheet_answers.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449781/normal_6032ca987ddeb.pdfIn PDF document text
    • https://cdn.sqhk.co/xovepejegosi/ifjaxDd/new_year_photo_frame_2020_online.pdfIn PDF document text
    • http://dororuminaxa.mywebcommunity.org/how_to_reset_pilot_light_on_worcester_boiler.pdfIn PDF document text
    • https://cdn.sqhk.co/vonezositixi/z3Lhigg/94288296990.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446029/normal_5fde1f448eb60.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448740/normal_601776da9003d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391621/normal_601f868741b44.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484103/normal_6014666b36d8e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402247/normal_6033696878e97.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475406/normal_603b87b422527.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://puredaw.rf.gd/how_many_chapters_are_in_nectar_in_a_sieve.pdfIn PDF document text
    • http://mekofirudusem.rf.gd/wallpapers_4k_ultra_hd_free.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_off0000d6eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6EB 5520 bytes
SHA-256: defaa871bbdca9d89a82279db6a89f0e433e8cb5cca4fd7cbcfd7b271ee1daa6
font_01_sfnt_off0000e9ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9CE 10368 bytes
SHA-256: 141d0ecfa7ffa5ae249d877d375236760c0b04bf740fa97e6848bc5d87f70120

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