Malicious PDF — malware analysis report

Static analysis result for SHA-256 3415370bef41dd3a…

MALICIOUS

PDF

65.6 KB Created: 2020-12-15 17:38:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 1d69cbbf70b3225ae1cee9e1d63cdc0d SHA-1: b7033ed215513a249206619461a986859ee261f0 SHA-256: 3415370bef41dd3a3a07182bc74f9feb5d7afd9f5b9182ff32b93853e8ec7f69
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and a machine learning classifier. It contains an embedded URL disguised as information about 'Wells Fargo student loans' which points to a suspicious domain. The PDF also contains a link farm, suggesting an attempt to manipulate search engine results or distribute further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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
  • 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.
  • 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://traffnew.ru/aws?utm_term=wells+fargo+student+loans+information PDF link annotation
    • https://pesodubebugi.weebly.com/uploads/1/3/4/2/134234841/numaguzi_mugesosobidomu.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/saxefi/example_of_relational_model.pdfIn PDF document text
    • https://s3.amazonaws.com/diwitapezu/vopavabusikuturukipizep.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc1015360f2895dc1e86a3c/t/5fc1d08764571256547f48d4/1606537351474/14111653463.pdfIn PDF document text
    • https://s3.amazonaws.com/vetamedisoz/seduxitonorop.pdfIn PDF document text
    • https://s3.amazonaws.com/rorives/top_kid_gifts_of_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/sabobenuwe/lefaxudekevujeleliwo.pdfIn PDF document text
    • https://s3.amazonaws.com/kovilowab/75297269868.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc1175aa879396864096daa/t/5fc1eea9173fb5383be81510/1606545065289/dancing_bears_grateful_dead_images.pdfIn PDF document text
    • https://s3.amazonaws.com/betimugi/lixajopotiwomej.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_off0000c2e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC2E9 5240 bytes
SHA-256: a146a099f4d2a1f786371aef44a6c10c2ae4b427d6ce8893646c333b69a77932
font_01_sfnt_off0000d4b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4B3 11052 bytes
SHA-256: aa60778107e195e2bb5345ef231bf4333a69259eef6a80380075e871b9281690

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