Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f97cb1536e1e15f…

MALICIOUS

PDF

70.3 KB Created: 2021-02-26 15:26:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: f8b6e56be9fd3e7f1f3250fd09902684 SHA-1: 58f11467459b6d194234b3011e0f1ea8af0d53c6 SHA-256: 1f97cb1536e1e15f193a5f6e315a2fb3e4f17217cea4a87e48ecc1b7550fa322
184 Risk Score

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
  • 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/wix?keyword=house+owner+history+free In PDF document text
    • http://helplnstagramcontact6088756.com/voxavirekus2f1x9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419211/normal_6015b89479b19.pdfIn PDF document text
    • http://mebelintera.ru/best_motorcycle_for_1000_dollarsrxmfv.pdfIn PDF document text
    • https://cdn.sqhk.co/kopilixa/gQgdicd/78720691921.pdfIn PDF document text
    • https://cdn.sqhk.co/repoxovu/fkgibig/vazagujetivulawedofa.pdfIn PDF document text
    • http://bosamitax.22web.org/sarcastic_answer_to_are_you_single.pdfIn PDF document text
    • https://bozobamawokoruv.weebly.com/uploads/1/3/4/3/134350924/9821266.pdfIn PDF document text
    • http://helplnstagramcontact6088758.com/exo_terra_terrarium_lock_instructionsw9pqj.pdfIn PDF document text
    • https://cdn.sqhk.co/guwaloxipete/gj6Cfjb/kicking_horse_river_rafting_hydra.pdfIn PDF document text
    • https://ramageputa.weebly.com/uploads/1/3/1/6/131637054/8269154.pdfIn PDF document text
    • http://pepirizibizedel.22web.org/87100566671.pdfIn PDF document text
    • http://beweroxaku.66ghz.com/vojiwe.pdfIn PDF document text
    • https://tadinitalu.weebly.com/uploads/1/3/4/7/134744808/4435697.pdfIn PDF document text
    • https://jesiwiluvilad.weebly.com/uploads/1/3/1/8/131857580/b04f7f0db.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fetijuvutod.epizy.com/druid_feats_pathfinder_2e.pdfIn PDF document text
    • http://gukisika.rf.gd/sevem.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_off0000d8c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8C5 4768 bytes
SHA-256: 2078c89a7495d712a2113c2af89bdfd3d86ef55e423382b0dae86a329679a4b8
font_01_sfnt_off0000e90b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE90B 10380 bytes
SHA-256: 9014bd48b95129c85be4ab141b7c347cc8f98432a47699a1eec2a93e18e8be78