Malicious PDF — malware analysis report

Static analysis result for SHA-256 0fb79021e8137259…

MALICIOUS

PDF

73.8 KB Created: 2021-03-01 07:24:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 844a87bc2867174771992562786ec455 SHA-1: 312ad0b6a870604a319996c2998bd74f7e4760a3 SHA-256: 0fb79021e8137259680cd45dd164fb0329fdc4ca5e961b3a801e92818a8fcfb1
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs and is flagged by heuristics as a link farm on disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document designed to redirect users to potentially harmful sites.

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://resalured.ru/wix?keyword=how+to+hack+contract+killer+sniper PDF link annotation
    • https://cdn.sqhk.co/xikotoxerov/ljcJhcV/rotamubarafipud.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379844/normal_60019eb832871.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409403/normal_6012ed9c69de8.pdfIn PDF document text
    • https://tadivibudup.weebly.com/uploads/1/3/4/8/134899420/5084046.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426270/normal_5fd7dee3eec58.pdfIn PDF document text
    • https://jipuzalo.weebly.com/uploads/1/3/4/6/134693454/2565f2ab9178f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467950/normal_5feefc97c7fb7.pdfIn PDF document text
    • http://opticsystem.website/gedixonovemasoqb6jr.pdfIn PDF document text
    • http://xepelewatelaziv.getenjoyment.net/46184013484.pdfIn PDF document text
    • http://community-day.ru/53650722416yf5e0.pdfIn PDF document text
    • https://cdn.sqhk.co/goxobuve/agjjdji/newesukepasi.pdfIn PDF document text
    • https://cdn.sqhk.co/puxezuxivas/iifgcwO/sinimapilavade.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415055/normal_5fdb3f754f5b0.pdfIn PDF document text
    • https://cdn.sqhk.co/tiwumixe/S0u5Kms/mini_craft_2020_master_craft_vegas_games.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/nezanurugega/lisafiragetijazatuv.pdfIn PDF document text
    • https://s3.amazonaws.com/mijumomub/33651372693.pdfIn PDF document text
    • http://zerowegujij.onlinewebshop.net/why_is_my_sound_bar_not_working_with_netflix.pdfIn PDF document text
    • https://s3.amazonaws.com/luramamelolem/momitawewisorivovixizi.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_off0000e544.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE544 5136 bytes
SHA-256: 6e83193376723670d452bccb8e98497d785083449506cab4d2a838309bad1917
font_01_sfnt_off0000f6c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6C7 10472 bytes
SHA-256: 164b66b52c1ef04f4a0be80f35721fabfadb8d1fa8fbc6bb6bcaddb2aa24df29

Open this report in the interactive analyzer, or submit your own file for analysis.