Malicious PDF — malware analysis report

Static analysis result for SHA-256 7060ab511364e64b…

MALICIOUS

PDF

66.0 KB Created: 2020-11-09 22:54:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 76ae7f06f215245c3b8a2eaf2c30da31 SHA-1: b8a04ba14bbb8927faf833350f1780bab493a5e4 SHA-256: 7060ab511364e64bb6f6d1aa079162328bdbf8a6e8658a71f8ec59f8bc331e97
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a significant number pointing to a link farm hosted on weebly.com. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of generated links, suggesting a phishing or malicious redirection scheme. The presence of embedded URLs and the ClamAV detection further support a malicious classification, 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
  • 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://traffset.ru/strik?keyword=sfusd+calendar+2019-20 PDF link annotation
    • https://mizegagemogu.weebly.com/uploads/1/3/4/6/134602102/9091625.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365542/normal_5f8e18bc0b5ea.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/kakekojezutok/wida_level_3.pdfIn PDF document text
    • https://s3.amazonaws.com/farezelof/fuverakexalaboredudetomo.pdfIn PDF document text
    • https://s3.amazonaws.com/rubidokezive/the_act_of_marriage_book.pdfIn PDF document text
    • https://s3.amazonaws.com/zuses/gowitawuzemibupurevajuzak.pdfIn PDF document text
    • https://s3.amazonaws.com/wavunot/55252149043.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/figesum.pdfIn PDF document text
    • https://s3.amazonaws.com/nijosinizo/ecuacion_cuadratica_formula.pdfIn PDF document text
    • https://s3.amazonaws.com/tosevud/john_deer_manual_lt150_lawn_mower.pdfIn PDF document text
    • https://s3.amazonaws.com/rerinago/13725566942.pdfIn PDF document text
    • https://s3.amazonaws.com/gewuwasi/stealth_hawk_antenna_gain.pdfIn PDF document text
    • https://s3.amazonaws.com/jeponowon/29939414156.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_off0000c583.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC583 5632 bytes
SHA-256: e5245c83327c9a8cbaeef1521f3e4fa6422c22997451489be78d82ea5977d4e6
font_01_sfnt_off0000d8bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8BF 10236 bytes
SHA-256: 0a4b31cfd73758aa5cbdcd58a8d7eaeb95a8d842fb9441e23b2384cd38083a1a

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