Malicious PDF — malware analysis report

Static analysis result for SHA-256 f44b2c7444117dcd…

MALICIOUS

PDF

75.4 KB Created: 2021-02-02 22:44:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 5eecf756d74819a5bc5ac4e8eb878fda SHA-1: 15161a379b65f420e112515a8e8b916012da0160 SHA-256: f44b2c7444117dcd09a1f3b1b434716fdd0dadccbe1e9e4b822fc9c9af4c351c
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 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.
  • 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://bologen.ru/wb?keyword=baking%20cake%20games%20apk PDF link annotation
    • https://vufupobuzalezu.weebly.com/uploads/1/3/4/8/134853030/8785e1f438c7.pdfIn PDF document text
    • https://ludebopukum.weebly.com/uploads/1/3/1/3/131380916/435469.pdfIn PDF document text
    • https://wagimudo.weebly.com/uploads/1/3/4/4/134475497/561590.pdfIn PDF document text
    • https://nudiwosesi.weebly.com/uploads/1/3/4/3/134317077/8819388.pdfIn PDF document text
    • https://warevinigipa.weebly.com/uploads/1/3/4/8/134898994/diwivomad.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4443588/normal_5ffe9d1d2fb08.pdfIn PDF document text
    • https://tixuxajus.weebly.com/uploads/1/3/2/6/132682254/bcaabb6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449605/normal_5ffdf4f478e95.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/fekaduvopigab/adjectives_worksheet_for_grade_3_cbse.pdfIn PDF document text
    • http://ruriwujuvuwa.epizy.com/40175132306.pdfIn PDF document text
    • http://magivaxinel.rf.gd/pareto_fundraising_benchmark_report.pdfIn PDF document text
    • http://delenujafoxa.rf.gd/admission_form_in_delhi_university_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/ditiruz/73260320698.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxexi/electron_configuration_part_2_worksheet.pdfIn PDF document text
    • http://zenejifawulo.epizy.com/jumobilufiridiriwidafube.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_off0000ea4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA4A 5236 bytes
SHA-256: b00de13ab0d6eb949c901a8a0879cf3bef49853a58822f3091f6f4faff0c09b5
font_01_sfnt_off0000fc1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC1A 10736 bytes
SHA-256: bd2e6d2dc991f2da0e4c6fe14c504628e30eb757caa992371f76243ffba1cfc0