Malicious PDF — malware analysis report

Static analysis result for SHA-256 322b1f1bbdab8a90…

MALICIOUS

PDF

77.3 KB Created: 2021-02-24 13:25:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: ecf63d08361d41e62c6cc6956cabf371 SHA-1: c58741a491876237a06099d948c170492475d930 SHA-256: 322b1f1bbdab8a90b5c0d72fb032c5cdccf8c83dc59921bd99a97b475580da54
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified as a 'PDF link farm'. One of the primary links points to a URL that appears to be part of a phishing or malicious content distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery.

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://bologen.ru/strik?utm_term=where+is+midwest+manufacturing+located PDF link annotation
    • https://gujowidupisume.weebly.com/uploads/1/3/4/1/134131448/826c2217776db7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402956/normal_5fd09342999c6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496153/normal_5ffd602dad55e.pdfIn PDF document text
    • https://wexabegolorumad.weebly.com/uploads/1/3/4/3/134351445/xikumifawikaxuvewa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450426/normal_5fd090c3c9a74.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385412/normal_5fc9394d42156.pdfIn PDF document text
    • https://funofumid.weebly.com/uploads/1/3/4/8/134886651/vekabuvil.pdfIn PDF document text
    • https://rozuguki.weebly.com/uploads/1/3/0/7/130775318/7771612.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459791/normal_601b0e7267635.pdfIn PDF document text
    • https://nabinavupofi.weebly.com/uploads/1/3/5/3/135350319/mamedulibokobolijon.pdfIn PDF document text
    • http://mixed-rootwork.com/85511962626b5xlz.pdfIn PDF document text
    • https://binikefesomeb.weebly.com/uploads/1/3/5/3/135386190/870134bfbca.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366965/normal_600299f9d119d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/mefadedosuw/evaluating_absolute_value_expressions_worksheet_kuta.pdfIn PDF document text
    • https://s3.amazonaws.com/jenisozazewubo/50492448662.pdfIn PDF document text
    • https://s3.amazonaws.com/debiwelof/dragon_ball_z_manga_color_online.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e2d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2D7 5424 bytes
SHA-256: 41a95b415563f4889cea9b2726de44e04e1e92eb07b046c3945bea630a842051
font_01_sfnt_off0000f539.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF539 10632 bytes
SHA-256: 8447ed635fd57c282f5895833036f14ed15a5016955e32caeb4a1a284f747f94
font_02_sfnt_off000119ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119AE 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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