Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc6b81abe4f10fc0…

MALICIOUS

PDF

68.3 KB Created: 2021-02-16 10:13:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 4ef7cde22feec31838161bad8adcda54 SHA-1: 3cf5c094e722bbe163c59fd6f4893318e727ca04 SHA-256: bc6b81abe4f10fc010773946c328bfd4bb23f86f5b0c0712652a53fb95518235
244 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 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://yafferge.ru/wix?keyword=principles+of+development+by+lewis+wolpert+cheryll+tickle+pdf In PDF document text
    • https://cdn.sqhk.co/fowonawex/6jgShda/allegiant_flights_to_florida_from_des_moines.pdfIn PDF document text
    • https://cdn.sqhk.co/zetuzire/iWhhKQe/23641381533.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460450/normal_601ad31b1d7f6.pdfIn PDF document text
    • https://cdn.sqhk.co/rozamulev/Qhcxhey/lepasij.pdfIn PDF document text
    • https://jimiporumina.weebly.com/uploads/1/3/6/0/136088268/0527a9d.pdfIn PDF document text
    • https://pukefigagarit.weebly.com/uploads/1/3/1/4/131406744/bubolivebulog_febadakiripo_zovuzemuvunizu_pujajetipuwirop.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418972/normal_5fd64b5400afd.pdfIn PDF document text
    • https://jixejuterekafiw.weebly.com/uploads/1/3/4/5/134508928/5176564.pdfIn PDF document text
    • https://cdn.sqhk.co/tatidukigag/MCjhjD4/natikikasupokifuwunowubiv.pdfIn PDF document text
    • https://dodikajopofibu.weebly.com/uploads/1/3/4/7/134704264/namizo.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/tisegovofu/canon_rebel_t3_manual_settings.pdfIn PDF document text
    • http://ravigokabuf.rf.gd/free_online_math_worksheets_for_1st_grade.pdfIn PDF document text
    • http://bonanelokuweje.rf.gd/ridukab.pdfIn PDF document text
    • http://sixexelotu.epizy.com/after_we_fell_read_online.pdfIn PDF document text
    • http://wanedinak.epizy.com/canon_laser_printer_android_app.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ce56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE56 5644 bytes
SHA-256: cfddcbf51eb1c763ffcacf040e908a1119a45cac6cf036649f95c29b2c85ba32
font_01_sfnt_off0000e177.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE177 10124 bytes
SHA-256: b41ff9e3830927417edf55c45f32224ed3878abe912321e0ee01a4405ee7ddcf

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