Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d29f8a7b8463a3c…

MALICIOUS

PDF

77.5 KB Created: 2021-01-14 05:36:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: d7ce983f62af1c4f75452da552a2a701 SHA-1: 27a585be56b9a6e48305848b58949bcce642e72b SHA-256: 2d29f8a7b8463a3c513c8cb2c49b50eb69be047c6367f4c1d2d1bed4bb312ca8
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many pointing to PDF files hosted on file-sharing services, indicative of a link farm or redirection scheme. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. The embedded URLs are used to redirect users to potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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://trafffe.ru/aws?utm_term=birthday+collage+template+online PDF link annotation
    • https://bilafewutugu.weebly.com/uploads/1/3/4/6/134619215/mekunebu-taxulolixiz-tosefi.pdfIn PDF document text
    • https://fofosefekilom.weebly.com/uploads/1/3/0/8/130813764/guxevaledaga-xakenojat-sagexudimajo-tegeb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4472188/normal_5fc46deeb4b97.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4456712/normal_5ff85a4b315ed.pdfIn PDF document text
    • https://cdn.sqhk.co/litalile/hajdKij/ralphs_ice_cream_brands.pdfIn PDF document text
    • https://site-1175063.mozfiles.com/files/1175063/anti_boring_android_games.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409797/normal_5ff6c0addc783.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458144/normal_5fd8da2d828b6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391308/normal_5f9c82ca2d6cc.pdfIn PDF document text
    • https://xadaxiwunitari.weebly.com/uploads/1/3/0/8/130814235/4552742.pdfIn PDF document text
    • https://goxapumub.weebly.com/uploads/1/3/4/8/134884232/7558331.pdfIn PDF document text
    • https://mafopobivo.weebly.com/uploads/1/3/4/3/134322173/noxafow.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472213/normal_5fdc203ece385.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500183/normal_5fca1937736d0.pdfIn PDF document text
    • https://wotipufa.weebly.com/uploads/1/3/1/0/131069738/a28b2ce254d4312.pdfIn PDF document text
    • https://site-1083549.mozfiles.com/files/1083549/kemorofupapewiwegawaniju.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000f2c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2C1 5460 bytes
SHA-256: 30ae6282b1623a3490f4625881f321077a77d62bd00069ca0df4530f1c8a5b78
font_01_sfnt_off00010537.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10537 10704 bytes
SHA-256: f31ebdd65d9b6a7262538c3d98c3f69a24658abb236d05487e6afcc5aafccf6b

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