Malicious PDF — malware analysis report

Static analysis result for SHA-256 5fa2262514c6937a…

MALICIOUS

PDF

80.1 KB Created: 2021-01-03 08:18:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: e4437e2a19459a0ada18e6d9d7f23983 SHA-1: 61d3a28f34e606c8bad7737d9b8922a1d6e2f9c8 SHA-256: 5fa2262514c6937a6ec0ce8ccefa951666e905597d5d76b0c96ca22fbf73017c
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/123?utm_term=cancionero+catolico+para+guitarra+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4378406/normal_5f9df36ea39af.pdfIn PDF document text
    • https://datamabijiremu.weebly.com/uploads/1/3/4/6/134691522/addc5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393029/normal_5ff0e89934e6d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367273/normal_5f878f0cad0d7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482403/normal_5fbd4cb5d3a7d.pdfIn PDF document text
    • https://wusaworapivuwor.weebly.com/uploads/1/3/4/6/134659128/pipepogazokager.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371799/normal_5fb34ba395d18.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493266/normal_5fd929df148b9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403264/normal_5f9f4319a975c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371808/normal_5fe6c03c6a211.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/juxatop/dijofofeguno.pdfIn PDF document text
    • https://s3.amazonaws.com/buwosevax/drama_taiwan_endless_love.pdfIn PDF document text
    • https://s3.amazonaws.com/fixararololu/beyblade_burst_app_mod_apk_android_1.pdfIn PDF document text
    • https://s3.amazonaws.com/lezopobigeza/8212242452.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_off0000f9f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9F2 5048 bytes
SHA-256: 7eb8f712bbef97d587b89815fb0a144cff3ccd39a59357d6d13ae8c40f86261e
font_01_sfnt_off00010b2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B2C 11860 bytes
SHA-256: 768aa6f4fd5376ab0707567204353c392ba7800b5f2bcea2a5a9b57dee35ca0e

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