Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ab96ebd7576ce36…

MALICIOUS

PDF

68.0 KB Created: 2020-11-18 15:27:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 0aa01d559d890b3e975f89de3f6ce7f0 SHA-1: 1b10ca30472489d9f14ec8c47141b00205f99501 SHA-256: 2ab96ebd7576ce363280ecaab269e808373c67b3a61d8f21cfbc3503ae707ad9
214 Risk Score

Malware Insights

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

This PDF file contains numerous links to external websites, many of which are part of a link farm designed to manipulate search engine results. One critical heuristic identified a link to known malicious redirector infrastructure, suggesting an attempt to phish or deliver malware. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://traffine.ru/123?utm_term=biography+reading+comprehension+worksheet+pdf In PDF document text
    • https://wumotobu.weebly.com/uploads/1/3/4/3/134370577/tewis.pdfIn PDF document text
    • https://visosoduvevup.weebly.com/uploads/1/3/4/2/134234588/1a4cff087ecef.pdfIn PDF document text
    • https://sanuvexugivi.weebly.com/uploads/1/3/1/6/131606490/4858692.pdfIn PDF document text
    • https://vewawuwidavejo.weebly.com/uploads/1/3/4/4/134403009/a45aa74b246b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390664/normal_5f912eca10443.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/wivunonovef/vedunurolalilox.pdfIn PDF document text
    • https://s3.amazonaws.com/kovilowab/37723015662.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c26a713f-6df9-43a6-819c-d1b2030e4793/97725299646.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/37443ab2-ea5f-4c26-896b-fec157a057d0/wofitagubipaguxa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f267247-fd02-498c-8cc6-f1ddf11cf968/bozalopiwasonobipenut.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c44c0a92-b72b-44fa-ac89-b10ba3d33894/kunogenanugotikikej.pdfIn PDF document text
    • https://s3.amazonaws.com/tetofamuxulil/82355848439.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/80b2f414-d782-48df-bb34-afb0812a98db/temple_of_the_winds_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f3532af-da1c-4655-8c1d-cc7d4fb89466/tegepaji.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3269e87a-ea8c-4d99-9913-4a086ab49d6a/28183274534.pdfIn PDF document text
    • https://s3.amazonaws.com/vajefam/43546743337.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_off0000cb7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB7B 5844 bytes
SHA-256: 5e8486e7ee7bb7662291ebdfa00556aaf4d34a7fb6cf55904a14c99b17af31a6
font_01_sfnt_off0000df59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF59 10520 bytes
SHA-256: db08d55d067fe94788dca7a4741c56269d2130c4d7a120de7f8129e06310b248

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