Malicious PDF — malware analysis report

Static analysis result for SHA-256 9fd4543206caf99c…

MALICIOUS

PDF

100.1 KB Created: 2021-01-03 08:09:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 1b5f976a19e454775e7ca56c6ff2bcf5 SHA-1: 7d8bc9f2d4a52e9ca63f9b53567c7dd13fc93701 SHA-256: 9fd4543206caf99ccde667acfc60bc90a7b2a8236a9a5d3961bbdd13668c9b96
156 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic. One of the primary URLs points to 'trafficel.ru', suggesting a phishing or malicious content distribution attempt. While no scripts were explicitly extracted, the nature of the link farm and the ML classification indicate a high likelihood of malicious intent, possibly involving the execution of further malicious content or redirection to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://trafficel.ru/123?utm_term=the+immortal+instruments+2nd+movie PDF link annotation
    • https://cdn.sqhk.co/juxerawabuf/ifriahi/xuregizamidepe.pdfIn PDF document text
    • https://nobawevedidilut.weebly.com/uploads/1/3/1/3/131379382/ridewomesom.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479236/normal_5fe0e854d542f.pdfIn PDF document text
    • https://cdn.sqhk.co/tadawatimi/ichdNhi/20554561149.pdfIn PDF document text
    • https://cdn.sqhk.co/xasexuwosul/Xhihmyf/final_fantasy_legend_iii_maps.pdfIn PDF document text
    • https://tijisevivojo.weebly.com/uploads/1/3/4/5/134502531/wopijisugaka_wuzesesi_tudesavup_dutizifibezin.pdfIn PDF document text
    • https://litiwufedoza.weebly.com/uploads/1/3/0/7/130739575/ziloseviwo.pdfIn PDF document text
    • https://cdn.sqhk.co/bowawugafux/LjdKifd/xozeputogijogevudivalese.pdfIn PDF document text
    • https://bogezozoxo.weebly.com/uploads/1/3/4/4/134479702/vonisilegokaxuk-fivobinila-dunazokoxexoniv-bupig.pdfIn PDF document text
    • https://vadurevagide.weebly.com/uploads/1/3/3/9/133999829/4070476.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/pirofopafu/wurozonanil.pdfIn PDF document text
    • https://s3.amazonaws.com/bajuse/87274359065.pdfIn PDF document text
    • https://s3.amazonaws.com/fupanabivote/bapiwilidifer.pdfIn PDF document text
    • https://s3.amazonaws.com/vufupu/guided_meditation_for_healing_disease.pdfIn PDF document text
    • https://s3.amazonaws.com/pazifetanegapu/22590612331.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_off000149a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x149A5 5204 bytes
SHA-256: 24a048a750daf5eafc4dfc042fd9ba8860763d5c4ccf18c851042749e9e1ac3a
font_01_sfnt_off00015b2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15B2D 11784 bytes
SHA-256: 88197c725a1dfae49d951c5dacd8e8d049385d8fffd51f3392c5db08c560175d

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