Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d34ad55a86e3527…

MALICIOUS

PDF

63.1 KB Created: 2021-02-19 01:18:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 2e9918412e9bf6f3d7e924b0fbc99c3f SHA-1: 5a145fdb2ce3e3789c1a637079f7ce3cfbfcb02c SHA-256: 0d34ad55a86e35278428b69e97f615d74ee16a25a0f13bbd158c7a953d684f4e
126 Risk Score

Malware Insights

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

The PDF contains an embedded URL pointing to 'bologen.ru' which is flagged as a link farm on disposable hosting, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document, likely delivered via spearphishing.

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://bologen.ru/strik?utm_term=garmin+approach+s62+gps+watch PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4444356/normal_60283c4e5021d.pdfIn PDF document text
    • https://jakipafowikodo.weebly.com/uploads/1/3/1/0/131070805/9024487.pdfIn PDF document text
    • http://abzac.me/the_great_gatsby_1080p_wallpapervdovr.pdfIn PDF document text
    • http://chestlune.online/willy_wonka_bookty7bz.pdfIn PDF document text
    • https://zomutelisofo.weebly.com/uploads/1/3/4/7/134712892/2089014.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366009/normal_6006b8885f8b7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472479/normal_5fe67a5485d93.pdfIn PDF document text
    • http://alkostore.xyz/41415487411godnh.pdfIn PDF document text
    • http://xesebufawif.iblogger.org/kwese_free_sports_guide.pdfIn PDF document text
    • https://jodavetofa.weebly.com/uploads/1/3/1/4/131438562/tolugalabifude.pdfIn PDF document text
    • https://rebumazezip.weebly.com/uploads/1/3/4/8/134860465/lakesexifutow.pdfIn PDF document text
    • http://volosaty100.xyz/nikolerigivevopavl7kov.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457296/normal_5fd2e5324de71.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/doxifuba/django_template_engine_tutorial.pdfIn PDF document text
    • http://dovobol.epizy.com/autotransformer_single_line_symbol.pdfIn PDF document text
    • https://s3.amazonaws.com/lezopobigeza/analogies_worksheet_with_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/zuwosil/dawesademataxop.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_off0000bb9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB9B 5724 bytes
SHA-256: 1eea8992cee87a78c5719f462b6c7d92543febc2869991adb7bc7c4e2b86f247
font_01_sfnt_off0000cefe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEFE 9496 bytes
SHA-256: d5b694ff1e6b2274b15a9a3e0f3a7c0fd134bedc8f4dce38fd4d9492955269b4

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