Malicious PDF — malware analysis report

Static analysis result for SHA-256 f419c86e569c6810…

MALICIOUS

PDF

74.2 KB Created: 2021-01-28 08:54:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 77314f4d7568e1717b1bb5f5a0fb7dd3 SHA-1: 3f5aac8c9bac13c77a58861e1349cdbaaacf9da1 SHA-256: f419c86e569c68107aa2fe9e8a4db63a8c8684e5ed869cc03cbdc19c4d941e1b
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, indicating malicious content. It contains a large number of external links, suggesting a link farm or phishing attempt. The embedded URLs point to suspicious domains, likely serving as lures for users to download malware or submit sensitive information.

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://maypoin.ru/123?utm_term=cool+reader+apk+%25D1%2581%25D0%25BA%25D0%25B0%25D1%2587%25D0%25B0%25D1%2582%25D1%258C+%25D0%25BD%25D0%25B0+%25D1%2580%25D1%2583%25D1%2581%25D1%2581%25D0%25BA%25D0%25BE%25D0%25BC PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4454052/normal_5ffaa44a94fa6.pdfIn PDF document text
    • https://cdn.sqhk.co/vaminika/Wgf81jj/blood_pressure_medications.pdfIn PDF document text
    • https://cdn.sqhk.co/xivorotil/jiet5if/thrift_stores_in_wildwood_nj.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450511/normal_5fe4ef9d14473.pdfIn PDF document text
    • https://napajudiweji.weebly.com/uploads/1/3/4/3/134316113/48683c0.pdfIn PDF document text
    • https://cdn.sqhk.co/zobunifi/Z08ojix/kapiduvuzabosudukexusexop.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372735/normal_5ffe7d48bcbb1.pdfIn PDF document text
    • https://tidukefawa.weebly.com/uploads/1/3/4/8/134851120/seluduravibo.pdfIn PDF document text
    • https://cdn.sqhk.co/zirimikuj/wijUYii/49548528809.pdfIn PDF document text
    • https://cdn.sqhk.co/busunava/bhcjbZw/7385552749.pdfIn PDF document text
    • https://cdn.sqhk.co/gipirukanut/hkdifCg/31714561926.pdfIn PDF document text
    • https://cdn.sqhk.co/zasokolof/Oibmbha/jibinakuvu.pdfIn PDF document text
    • https://xurufujes.weebly.com/uploads/1/3/4/8/134864067/1265541.pdfIn PDF document text
    • https://cdn.sqhk.co/fazejitev/Nwe2hhb/mitimosituwepu.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/nowokil/bionic_arm_template.pdfIn PDF document text
    • https://s3.amazonaws.com/viboxikuz/39140110455.pdfIn PDF document text
    • https://s3.amazonaws.com/bejeseja/progressive_era_reforms_worksheet.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_off0000d732.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD732 5860 bytes
SHA-256: ac695c6d2eb6f7cf3a1e6673cb5647ce9ebb161173f01386b47b1bf27d0b1fa9
font_01_sfnt_off0000e9fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9FC 15180 bytes
SHA-256: 0ed929de851cc532b79950abdbbd0998705c86a570975f9d0d740eae6fea4021

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