Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c5ad80c68aee3ac…

MALICIOUS

PDF

94.0 KB Created: 2020-11-14 18:28:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: db5620e4db862d31dc4b944df1aacdfd SHA-1: 741707129f8161ae4890ebc4fcb7b52c07c0637b SHA-256: 4c5ad80c68aee3ac8edfd624b8f68e3c32630048d5e842c65998dc96e6fdd5dc
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, characteristic of a link farm designed to attract traffic or distribute malware. The primary URL, 'https://traffset.ru/strik?utm_term=cutting+aces+shadowrun+pdf+free+download', suggests a lure related to downloading game-related content. While no scripts were explicitly extracted, the PDF structure and the heuristic firings indicate malicious intent, likely to redirect users to malicious sites or download further payloads.

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://traffset.ru/strik?utm_term=cutting+aces+shadowrun+pdf+free+download PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4446275/normal_5faa78e5cb85a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448542/normal_5fa7e045d3aa4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375716/normal_5f985ab6759a9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426545/normal_5fab55e88a9b5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374024/normal_5f8d81ca4adb8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413235/normal_5f9745eb7b4e8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386593/normal_5f8cb766bedbd.pdfIn PDF document text
    • https://finiluxexolije.weebly.com/uploads/1/3/1/8/131856594/009f6df5f7df7.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/ladojenefe/metro_north_schedule_mt_vernon_east.pdfIn PDF document text
    • https://s3.amazonaws.com/vonusirukete/1574785201.pdfIn PDF document text
    • https://s3.amazonaws.com/vabedafozo/minecraft_medieval_fortress.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/canon_lide_220_specs.pdfIn PDF document text
    • https://s3.amazonaws.com/jeworurowam/classic_viscidus_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/saxefi/kolesedipifipepamifivaj.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_off00013052.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13052 5416 bytes
SHA-256: 4c2dd809aa2df757572810efa09ed4ba1b9bdbda4a97d52d500221de3d20ae73
font_01_sfnt_off000142c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x142C6 11400 bytes
SHA-256: 1ecb69ac34c6f5c094a1a0c4b533b289ae416fad1af72ec604538d6cf537dc0b

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