Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a1fbcce2ccb5026…

MALICIOUS

PDF

76.0 KB Created: 2021-02-16 09:57:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 7492f3d70cb88cb5bbde522dc9e60fd8 SHA-1: 588775dfb21b929afb4dfec2f2e3b56849eb8df7 SHA-256: 8a1fbcce2ccb50263a11c23d0744a92f3d6be8f0c5f87649e149e1789fa450f0
184 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics, including a critical finding for linking to known malicious redirector infrastructure. The embedded links, such as 'https://crophysi.ru/strik?utm_term=who+does+the+voice+of+voldemort+in+harry+potter', are designed to redirect users to potentially harmful sites. The document's structure and numerous links suggest a link farm or phishing attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/strik?utm_term=who+does+the+voice+of+voldemort+in+harry+potter In PDF document text
    • https://cdn-cms.f-static.net/uploads/4477629/normal_5fe8efdfa1ec0.pdfIn PDF document text
    • https://xigujevaw.weebly.com/uploads/1/3/4/7/134701692/nefelusamaroso.pdfIn PDF document text
    • https://zimavilagapiwe.weebly.com/uploads/1/3/2/7/132712623/jineme.pdfIn PDF document text
    • http://govnososal.xyz/vogereloxilopaspd65.pdfIn PDF document text
    • http://qupieasy.online/team_fight_tactics_cheat_sheet_scarras9b55.pdfIn PDF document text
    • https://cdn.sqhk.co/giwegulatil/iehUvP4/how_to_get_pokemon_home_free_trial.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446772/normal_5fca614c3ce55.pdfIn PDF document text
    • http://anbieterbewertung-autoscoutch.com/plano_de_estudos_medicinawvlm7.pdfIn PDF document text
    • https://zawasofolebu.weebly.com/uploads/1/3/4/9/134902788/c449fcb46.pdfIn PDF document text
    • https://kuxiwidozerapi.weebly.com/uploads/1/3/4/7/134728536/c53b361c8840d76.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382627/normal_6024a83f3e9b0.pdfIn PDF document text
    • http://hookup154.fun/tokenuverjlyd2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455669/normal_6000a2eddf985.pdfIn PDF document text
    • https://wapawovukeped.weebly.com/uploads/1/3/5/3/135333371/07b785.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://zutoribi.rf.gd/zepemiwufojov.pdfIn PDF document text
    • http://juzefabamurever.rf.gd/formation_of_andalusite_hornfels.pdfIn PDF document text
    • http://sodexodape.rf.gd/39352055101.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000de19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE19 5360 bytes
SHA-256: c6e613cfa67907def033282417c2bee10b128e56a81e0d0aa2d6dcc134206e9b
font_01_sfnt_off0000f040.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF040 10660 bytes
SHA-256: b51dd47fec68160d23f6ee10104b478d24752273b146af6f2cd103d796dbfad9
font_02_sfnt_off0001148e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1148E 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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