Malicious PDF — malware analysis report

Static analysis result for SHA-256 e331a840b98d00ce…

MALICIOUS

PDF

68.4 KB Created: 2021-02-19 07:49:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 0d7c1a766937c986675a1aff2d602b79 SHA-1: 334c7f8d33ed04565829ed2b0e15d0b801d02897 SHA-256: e331a840b98d00ce0485b8d9f9f1a96b9e98adf743d5d2845419a650eac52f2d
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting it is part of a link farm or phishing operation. The presence of embedded URLs and the overall structure point towards an attempt to redirect users to potentially harmful content.

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/strik?utm_term=percy+jackson+greek+gods+personality+test PDF link annotation
    • https://budovabi.weebly.com/uploads/1/3/4/5/134510119/6eb9dec1dda3a.pdfIn PDF document text
    • https://cdn.sqhk.co/buvaboda/tjeVZig/figamegok.pdfIn PDF document text
    • https://cdn.sqhk.co/meradipuwiz/5hhhjeX/wedding_dress_upcycle_ideas.pdfIn PDF document text
    • https://cdn.sqhk.co/zobunifi/Hjdjbgg/70575345589.pdfIn PDF document text
    • https://vokedovewugom.weebly.com/uploads/1/3/5/3/135349322/716788.pdfIn PDF document text
    • https://cdn.sqhk.co/nepelusir/GUjdfRr/jexaredo.pdfIn PDF document text
    • https://dowidevegep.weebly.com/uploads/1/3/1/4/131406741/vizatikavuzi-bilulefawikum.pdfIn PDF document text
    • http://clyb-wylcan3.space/17815205171xrau4.pdfIn PDF document text
    • https://totidulabi.weebly.com/uploads/1/3/1/6/131606487/navenifajipawanukiv.pdfIn PDF document text
    • http://yandex-dostav.ru/mikuderazqrh0d.pdfIn PDF document text
    • https://cdn.sqhk.co/vedanoderifu/ibgfFhd/mortal_kombat_11_ultimate_ps5_review.pdfIn PDF document text
    • https://cdn.sqhk.co/bipuzojafa/cjehbjh/describe_a_city_block_in_spanish.pdfIn PDF document text
    • https://cdn.sqhk.co/dakubakasilu/hj5hczs/need_for_speed_no_limits_hack_android_1.pdfIn PDF document text
    • https://dakijixubuleze.weebly.com/uploads/1/3/0/7/130740496/3487576.pdfIn PDF document text
    • https://cdn.sqhk.co/motuwezelu/ee69nLv/46443859622.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/pobixedele/lixaguvupupomagesido.pdfIn PDF document text
    • https://s3.amazonaws.com/gedimuta/tmaxx_2.5_vs_3.3.pdfIn PDF document text
    • https://s3.amazonaws.com/dikobepibelun/65704270412.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_off0000cd9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD9E 5484 bytes
SHA-256: f6476739ad2693e2d0502455f9f3aadaf890f1c870168cc7321b0142858b0d8c
font_01_sfnt_off0000e068.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE068 10556 bytes
SHA-256: 00d26b0e8a84da7c7471740e9dbc72bd79fb912edb9cc25370295e1abedc601d

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