Malicious PDF — malware analysis report

Static analysis result for SHA-256 2bd4726f1bcdd7c2…

MALICIOUS

PDF

72.4 KB Created: 2020-12-30 09:50:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 9581114e6d2329a4be355071a7983356 SHA-1: 783ec5f22f63826f14d05754e695855d401b85e3 SHA-256: 2bd4726f1bcdd7c2b91e692c30f796b7060f7acb294e379e64bb082b24892410
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a high-confidence ML classifier and ClamAV detection as a phishing trojan. It contains numerous external links, many hosted on disposable domains, suggesting a link farm or phishing lure. The document body, though partially corrupted, contains text related to 'The hangman's daughter review' and 'wkhtmltopdf', indicating a potential pretext for directing users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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 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://traffset.ru/123?utm_term=the+hangman%2527s+daughter+review PDF link annotation
    • https://cdn.sqhk.co/sawapevodef/fDjiyQk/stilisto_dress_up_games.pdfIn PDF document text
    • https://kibutudevitage.weebly.com/uploads/1/3/4/4/134499349/9638327.pdfIn PDF document text
    • https://vifedunujaxali.weebly.com/uploads/1/3/4/3/134398483/954117.pdfIn PDF document text
    • https://cdn.sqhk.co/lukedivibeb/gihhegg/zogotifegupeminewakawazow.pdfIn PDF document text
    • https://dutajidadu.weebly.com/uploads/1/3/4/7/134730474/c62ab695cfd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468838/normal_5faf7abe21a85.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425491/normal_5fb5cd84d8323.pdfIn PDF document text
    • https://rojusonevupa.weebly.com/uploads/1/3/0/8/130814232/279793.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/zaxuledo/50521007027.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0bebb7b9-45fd-4116-93e5-f9eeb7a3d93c/19212676471.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e1dc6ab-4702-43bb-8c3b-c62dda76eb5c/23898750049.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_off0000df0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF0B 5344 bytes
SHA-256: 7e8b5572d0723b748480f54d537b0d723cd872f69579921c01c13ca762336430
font_01_sfnt_off0000f123.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF123 10480 bytes
SHA-256: 32165f9019c9ee827602b0f5ae6ecf76d409660c06f9d48a89e57d3d71320bfe

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