Malicious PDF — malware analysis report

Static analysis result for SHA-256 01756676a0e3baaa…

MALICIOUS

PDF

84.4 KB Created: 2021-03-07 08:11:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 2703f5e1dfac84ef5901a2c7a9f58e44 SHA-1: af63701c229c10ba9c745b9cdf443ba80cb94802 SHA-256: 01756676a0e3baaa86e1a29d21c63ef8731607d52749b1e2c937b57a9e9e87bd
126 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs pointing to disposable hosting, a common tactic for phishing and malware distribution. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a link farm on disposable hosting, and the ML classifier and ClamAV detection strongly suggest malicious intent. The document body, though heavily obfuscated, appears to be a lure related to college admissions, aiming to trick users into visiting the malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://fokemale.ru/aws?utm_term=what+are+the+requirements+for+college+admission PDF link annotation
    • http://familyit.info/5149302051912ylp.pdfIn PDF document text
    • http://promoocaoameericanas.com/58598233225tlosi.pdfIn PDF document text
    • https://fefedajukuda.weebly.com/uploads/1/3/1/0/131070841/4482241.pdfIn PDF document text
    • https://cdn.sqhk.co/xikotoxerov/hdge2fI/pubodeke.pdfIn PDF document text
    • http://theporte.xyz/43949987521251mx.pdfIn PDF document text
    • https://cdn.sqhk.co/fupupusamun/g3geohd/gofamuveraravefasavesazev.pdfIn PDF document text
    • https://bukanunale.weebly.com/uploads/1/3/5/9/135974016/fixoxedivegux.pdfIn PDF document text
    • http://opssmall.space/livre_de_regle_warhammer_40000_v8qe8rr.pdfIn PDF document text
    • http://bu-markett.com/stihl_ms180c_mini_boss_parts4p3mk.pdfIn PDF document text
    • https://bopexetijajab.weebly.com/uploads/1/3/1/4/131411078/folirikelev-ruwevudatis.pdfIn PDF document text
    • https://kixivoveluvib.weebly.com/uploads/1/3/0/7/130775150/kopuwilimevivodajeba.pdfIn PDF document text
    • https://jebadufe.weebly.com/uploads/1/3/3/9/133997269/3704350.pdfIn PDF document text
    • https://cdn.sqhk.co/marixefe/hibgdn4/lasership_delivery_reviews.pdfIn PDF document text
    • http://dombitarf.ru/joining_the_conversation_online_book23xv6.pdfIn PDF document text
    • https://cdn.sqhk.co/fupokonabat/dJTAjj1/dude_perfect_live_reviews.pdfIn PDF document text
    • https://cdn.sqhk.co/xamitarerivu/gejejem/bowling_christmas_party_london.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/03d8bebd-edde-40a8-91e5-05501f78582b/jinem.pdfIn PDF document text
    • https://s3.amazonaws.com/votubukaxogilix/what_is_the_salary_of_junior_engineer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b1edafb-ec12-497f-9965-a740d6ca6a4f/lezixukemuzusewotuwifidi.pdfIn PDF document text
    • https://s3.amazonaws.com/resixexi/chikni_chameli_song_from_pagalworld.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ea800a60-1966-4523-a6ff-6c03b1f75852/ratuzivegepiduvaxibuz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/08ecd975-beb3-430e-b1cb-1a671654428b/nufutolagiboroxuzepik.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_off00010e3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E3F 5572 bytes
SHA-256: 061f01ff38e64902199b57979f5ee1ff61cd78087d2688b3b59d8a551748a6fa
font_01_sfnt_off0001210e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1210E 10124 bytes
SHA-256: a6ea9d979bb2a313e9c2a8a8fdf9f17b763c975813052b3f08cc1b4244f0e4c0