Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c046cc4ee635599…

MALICIOUS

PDF

73.7 KB Created: 2021-01-28 01:34:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 1b770ca98b73ec1b5e06971b0b47d500 SHA-1: eb1689d0935d79d2b6604f9b6e7805bab684b65a SHA-256: 6c046cc4ee63559900803aa1e1b12d25161ec387d6956fe42b1005229fc66fa8
186 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a significant number of external links, many hosted on disposable domains, suggesting a link farm or SEO manipulation tactic. The presence of embedded URLs and the overall structure point towards an attempt to redirect users to potentially harmful content, aligning with spearphishing attachment tactics.

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
  • 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://druttle.ru/123?utm_term=half+elf+wizard PDF link annotation
    • https://cdn.sqhk.co/fopavege/MhheUgR/zikawugelugoverimego.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427809/normal_5fd96042397da.pdfIn PDF document text
    • https://cdn.sqhk.co/lilapanorup/hoRidge/angle_meter_app.pdfIn PDF document text
    • https://cdn.sqhk.co/xamizine/hdtghij/47713536794.pdfIn PDF document text
    • https://dezijetide.weebly.com/uploads/1/3/4/8/134864221/6454739.pdfIn PDF document text
    • https://cdn.sqhk.co/tokarikadez/iVjblhg/vodevodafironani.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376878/normal_600078d463b68.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402711/normal_5fd066a8a4785.pdfIn PDF document text
    • https://rilobajivevet.weebly.com/uploads/1/3/1/4/131438099/mejivunef.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489441/normal_5fc8b5745a029.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tumofif.rf.gd/sleigh_ride_by_leroy_anderson_sheet_music.pdfIn PDF document text
    • http://desavoz.epizy.com/audible_failure_error_3004.pdfIn PDF document text
    • https://s3.amazonaws.com/fuzafuzeruwit/natolirizanedufosezufu.pdfIn PDF document text
    • http://zogivumomu.epizy.com/agasobanuye_by_rocky_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/dojonuta/ruxiruwapedewanopanive.pdfIn PDF document text
    • http://nikavavufuxirel.epizy.com/charmed_cw_episode_guide.pdfIn PDF document text
    • http://luwulifinuneti.epizy.com/62928549511.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_off0000e534.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE534 4824 bytes
SHA-256: 6a1a96b58156d429da635788b4cc7fd7001deca62389b67b6d9c264ffdbd8cd7
font_01_sfnt_off0000f5c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5C4 10520 bytes
SHA-256: 8af2077b75ddce7b5ca74d77396326d659b21ca4bfc877d2edd503cc6f798a49

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