Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d720ecc9a5ba295…

MALICIOUS

PDF

79.7 KB Created: 2021-01-22 10:46:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 1e9d0d6d8baf53a953291c704a75398d SHA-1: bb0071407a4b96d69c8677ec7352a8eea9360640 SHA-256: 3d720ecc9a5ba295df47dab7d3c9832b4b0e06e373928a97baedd3e5b82c10bd
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The presence of a PDF link farm heuristic indicates the document is designed to host numerous external links, likely for distributing malware or phishing content. The ML classifier output of 0.999574 further supports its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://baarspo.ru/123?utm_term=pueblo+viejo+colorado+springs PDF link annotation
    • https://site-1168059.mozfiles.com/files/1168059/worojisoxubalilafiwin.pdfIn PDF document text
    • https://cdn.sqhk.co/xetilibul/jgliehb/zuxikuropexex.pdfIn PDF document text
    • https://kumenesasewoton.weebly.com/uploads/1/3/4/7/134773405/tixodavufidakesar.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4498997/normal_6007af9a454f3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444655/normal_5ffc9d278a276.pdfIn PDF document text
    • https://sezijaxafiv.weebly.com/uploads/1/3/1/6/131637080/jisitabawogi.pdfIn PDF document text
    • https://site-1175190.mozfiles.com/files/1175190/galaxy_mirror_cake_images.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459165/normal_5ff81bce8951e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4443372/normal_5fce2d0a0b22d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367622/normal_5ffe90bc0d6a8.pdfIn PDF document text
    • https://bobifadilow.weebly.com/uploads/1/3/5/2/135295989/texirukamiv.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476783/normal_5fe0ecd66c937.pdfIn PDF document text
    • https://cdn.sqhk.co/nixafusoda/bhjCjer/tepubamikafe.pdfIn PDF document text
    • https://mafekesajivirik.weebly.com/uploads/1/3/4/3/134381466/7544721.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465010/normal_5fde1a44c7344.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446263/normal_5fcd7a875de2e.pdfIn PDF document text
    • https://sizemerekev.weebly.com/uploads/1/3/1/6/131606963/4182378.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464865/normal_6007a356f093e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lokanubuxona.rf.gd/77389600849.pdfIn PDF document text
    • http://pibimosozo.rf.gd/lagu_blackpink_dududu.pdfIn PDF document text
    • http://nelifofufotilep.epizy.com/transformar_177_cm_a_pies.pdfIn PDF document text
    • http://kopinakitiwodad.rf.gd/96292683396.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_off0000f7fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7FB 5516 bytes
SHA-256: 3f8a1236de2b81c59d6bdf32314b971e414808b9da7e6cff565caeae3dc1ef0d
font_01_sfnt_off00010acf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10ACF 10796 bytes
SHA-256: 028e1591882fcb442ef7b66d8c126da76c1a172294109add0e31bd140502f4a5

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