Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3c4459360877812…

MALICIOUS

PDF

71.9 KB Created: 2021-03-01 04:36:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 12a4ddd04e5fa0ed62c5420bd2cfaaec SHA-1: a2952ed53132a3201895f0ee8b599ff16437e830 SHA-256: b3c4459360877812684b3c69910ec4a6f45a0d30db3f36a377300d3206b95ec2
244 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
  • 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 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.
  • 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://dafemum.ru/award?keyword=what+is+the+significance+of+a+doll+house+title In PDF document text
    • https://static.s123-cdn-static.com/uploads/4471475/normal_5ff4b504c2c85.pdfIn PDF document text
    • https://josebugovoje.weebly.com/uploads/1/3/0/7/130738719/sefunamumaba.pdfIn PDF document text
    • http://glawerry.online/cdc_colorectal_cancer_screening_guidelines1o6r1.pdfIn PDF document text
    • https://varupeneg.weebly.com/uploads/1/3/0/9/130969993/00d85b1f.pdfIn PDF document text
    • https://cdn.sqhk.co/desogepupema/hfvPmib/pro_football_games_this_weekend.pdfIn PDF document text
    • https://jaradaka.weebly.com/uploads/1/3/0/8/130813635/gefuwumeri.pdfIn PDF document text
    • http://avtoshkola-region26.ru/motorola_g_power_user_manual6xw7s.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369179/normal_5fe320644fc58.pdfIn PDF document text
    • http://gufutaca1.xyz/plantronics_wireless_headset_pairing_mode6s2h6.pdfIn PDF document text
    • https://cdn.sqhk.co/zuzikewed/0gYbnid/56471847801.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460230/normal_6007b5209536c.pdfIn PDF document text
    • https://cdn.sqhk.co/bexutavukaro/ieuV1WJ/bodybuilding_fitness_apparel.pdfIn PDF document text
    • https://xataramev.weebly.com/uploads/1/3/4/3/134320843/4861670.pdfIn PDF document text
    • https://dixufewopirar.weebly.com/uploads/1/3/0/7/130775961/nezazizosuwononujopi.pdfIn PDF document text
    • https://ladufuvugekowek.weebly.com/uploads/1/3/4/1/134108614/videkowuvir_vopipil.pdfIn PDF document text
    • https://xunedoworevesa.weebly.com/uploads/1/3/1/1/131164322/tefirefej_tigalamaw.pdfIn PDF document text
    • https://debuvubuni.weebly.com/uploads/1/3/4/8/134846467/5082654.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000ddef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDEF 5200 bytes
SHA-256: c37d5d47225d8a04da5d51c9d8045b85079e9314c3deb7c14c7b520b93b07dc3
font_01_sfnt_off0000efb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFB2 10156 bytes
SHA-256: df90457c07c2906aa2c46290d3ff99a3f5e5c50295795a13bffaca113380cb78

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