Malicious PDF — malware analysis report

Static analysis result for SHA-256 dfd175417ad81f71…

MALICIOUS

PDF

66.0 KB Created: 2021-02-24 18:26:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: b29298d1b66b98a09666ce11cd213791 SHA-1: 7f0e876c9466653ebd337f090a43a811a630ec01 SHA-256: dfd175417ad81f712477ea7497a6873e0c0a9ad9b6d78c8073619433a02b4cf8
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, identified as a link farm, with one prominent URL pointing to a search result for a Garmin product. This suggests a phishing or malware distribution attempt, likely using the search result as a lure. The ClamAV detection and ML classifier strongly indicate malicious intent, classifying it as a phishing trojan.

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://maypoin.ru/award?keyword=garmin+vivosmart+3+strap+replacement PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4369936/normal_600f181f99de9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478968/normal_602e39846d2e9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418590/normal_601781ef73850.pdfIn PDF document text
    • https://cdn.sqhk.co/bitaxukezor/ijggQgB/35865554088.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425908/normal_5fe3bb94b7f52.pdfIn PDF document text
    • https://cdn.sqhk.co/segevenujuka/jfZib5a/13167508534.pdfIn PDF document text
    • https://rawiranuxox.weebly.com/uploads/1/3/4/6/134618620/muxekafom_xemitisowuwofup.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409394/normal_6033e901d5b8e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413866/normal_601f9cae6c065.pdfIn PDF document text
    • https://cdn.sqhk.co/pixukinoma/ihajbCc/sarcasm_meme_meaning.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4423471/normal_5fd069118ad6c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377679/normal_6016c4053e2f6.pdfIn PDF document text
    • https://kedumapeba.weebly.com/uploads/1/3/4/5/134593926/joxozoweru_wisemaxax_gotizexebagos_kutiwabedafele.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391920/normal_5fc6b8b411b5a.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_off0000c83d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC83D 5332 bytes
SHA-256: 0fba20ae919f65cb757861755240f43a0779c217bee295bad16510983fb375e5
font_01_sfnt_off0000da54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA54 9624 bytes
SHA-256: b5f70030ad3877f599826b8485085c02668abda4d228fd79dd84f43df8dc6bae

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