Malicious PDF — malware analysis report

Static analysis result for SHA-256 80d19a8446c0ac0c…

MALICIOUS

PDF

70.3 KB Created: 2021-02-26 23:13:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: f995c1221342103c4c14c7de4ed1a066 SHA-1: 0b50b6969751bcf268b097eb52605815a1152500 SHA-256: 80d19a8446c0ac0c9bfa3df38ff6804ca1f4051f9f441525d8e39e787c84276b
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with one specifically identified as an external URI leading to 'baarspo.ru'. Heuristics indicate the PDF is a link farm on disposable hosting, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly support a malicious classification, likely related to phishing.

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://baarspo.ru/123?utm_term=ken+waters+pet+loads+download PDF link annotation
    • http://lakujalinifibo.mypressonline.com/36565447700.pdfIn PDF document text
    • http://copyrightmediahelp.com/call_of_cthulhu_rpgcbt37.pdfIn PDF document text
    • http://endi-itali.space/journeys_out_of_the_body_hemi_sync_download0dwcy.pdfIn PDF document text
    • http://fofiwafajelerax.sportsontheweb.net/kenmore_elite_microwave_manual.pdfIn PDF document text
    • http://repaircreditscore.info/how_to_win_capsim_simulation_20215pfkf.pdfIn PDF document text
    • http://noncomform.space/94761113256hc2kw.pdfIn PDF document text
    • http://driveformclanemilwaukee.com/12874014367hkvas.pdfIn PDF document text
    • http://vvvvvvvvvvvvvvvvvvvvvb.xyz/sejpme_study_guidek84j1.pdfIn PDF document text
    • http://pazujiz.mygamesonline.org/63642060817.pdfIn PDF document text
    • http://nncucuucuc.space/sumozegekt427u.pdfIn PDF document text
    • http://extraterrestrials.space/79390197328pvfzd.pdfIn PDF document text
    • http://mrshadow.net/algebraic_structures_lecture_notesc0mfw.pdfIn PDF document text
    • http://fovikoxesaweziz.medianewsonline.com/hp_laserjet_p1006_driver_is_unavailable.pdfIn PDF document text
    • http://lodomujimujug.mywebcommunity.org/the_love_dare_day_by_day_reviews.pdfIn PDF document text
    • http://fakixigulidol.mywebcommunity.org/how_to_start_dewalt_3800_psi_pressure_washer.pdfIn PDF document text
    • http://alternativeinfluencenetwork.net/operations_management_textbook_online8zdeh.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dizavinizekabos.rf.gd/magic_tricks_book_in_urdu_free_download.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_off0000d616.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD616 5012 bytes
SHA-256: 08c3b7ac67a157a887633223ca8bb9a67f21477a03c01b3cb9cea54f4b1733e9
font_01_sfnt_off0000e744.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE744 11080 bytes
SHA-256: cb04c9a6f95a0ea70d85bea5461ab53fdecfc93fee0be7010515a99a0dcddfbd