Malicious PDF — malware analysis report

Static analysis result for SHA-256 2fbdfa134e8901e1…

MALICIOUS

PDF

88.3 KB Created: 2021-02-01 22:11:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 4629d4ff28d07f50912a0f6adc45e210 SHA-1: e08f0870ae5f46ac31b8dc34ea5b83bfb4c1a36a SHA-256: 2fbdfa134e8901e1cd3564293be046d68850d582261c1b9d775bc55ae8991178
246 Risk Score

Malware Insights

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

This PDF file contains a large number of external links, many hosted on disposable domains, indicating a link farm designed to obscure the final destination. The 'SE_BRAND_CREDENTIAL_PHISH' heuristic specifically flags an impersonation lure for Apple, directing users to a redirector hosted on weebly.com. This suggests the primary goal is credential harvesting through a phishing campaign. No scripts were extracted, but the structure and heuristics strongly point to a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://mawosamaretezij.weebly.com/uploads/1/3/4/8/134860838/kebusuxijima_laguzumuj.pdf.
  • 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/123?utm_term=my+time+at+portia+carbon+fiber+civil+corps PDF link annotation
    • https://mawosamaretezij.weebly.com/uploads/1/3/4/8/134860838/kebusuxijima_laguzumuj.pdfIn PDF document text
    • http://alternativeinfluencenetwork.net/maganukig5s1ke.pdfIn PDF document text
    • https://cdn.sqhk.co/fubebevukad/h5Yiaie/international_calling_cost_t-_mobile.pdfIn PDF document text
    • https://bomefojidog.weebly.com/uploads/1/3/2/6/132695402/witadaxez_lazetar_bifuzevudapuluf.pdfIn PDF document text
    • https://javeleguf.weebly.com/uploads/1/3/0/8/130873961/woxevixule.pdfIn PDF document text
    • https://nivojekegup.weebly.com/uploads/1/3/5/3/135322075/rasoruruvanopoje.pdfIn PDF document text
    • https://cdn.sqhk.co/poxufape/LXw8hfX/35781395087.pdfIn PDF document text
    • http://card2card-perevod24.site/brawl_stars_mega_box_chancesegu51.pdfIn PDF document text
    • https://cdn.sqhk.co/difixoruze/iiijHe4/aircraft_of_world_war_ii_a_visual_encyclopedia.pdfIn PDF document text
    • https://ninitirasaru.weebly.com/uploads/1/3/5/3/135317350/xelezif.pdfIn PDF document text
    • http://mignonette.space/nizifizabaxrb7v7.pdfIn PDF document text
    • https://rebazizezasij.weebly.com/uploads/1/3/4/5/134586802/4c733686f4b9c5.pdfIn PDF document text
    • https://cdn.sqhk.co/keropolor/wghQhjg/42264396442.pdfIn PDF document text
    • https://cdn.sqhk.co/sabeludejem/rtHkghZ/hd_rainforest_wallpaper_for_iphone.pdfIn PDF document text
    • https://cdn.sqhk.co/pasivuzuke/jiMvhaf/keyboard_shortcut_keys_to_paste_special.pdfIn PDF document text
    • https://bogezozoxo.weebly.com/uploads/1/3/4/4/134479702/2228082.pdfIn PDF document text
    • https://mipigonegomef.weebly.com/uploads/1/3/0/8/130813466/bojalomit.pdfIn PDF document text
    • https://giridoxaxe.weebly.com/uploads/1/3/4/7/134703098/8379da46a.pdfIn PDF document text
    • https://nevutero.weebly.com/uploads/1/3/4/7/134716167/zesakavukejolibujole.pdfIn PDF document text
    • https://cdn.sqhk.co/pedidagow/jg5g6qd/angry_snakes_cool_math_games.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off000119ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119BA 5468 bytes
SHA-256: 243b2c67bdd613b8a264e6fae2819e2a0a38f17d1c5c3d678d910b0012fc6b75
font_01_sfnt_off00012c51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C51 11456 bytes
SHA-256: ea6c5695dccbca93ab5b13c26fa70be507d76a06f09dd7f23079f716fc0b4533