Malicious PDF — malware analysis report

Static analysis result for SHA-256 47e1a355a43cb01f…

MALICIOUS

PDF

87.3 KB Created: 2020-12-24 19:44:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 7b4269a32f2b1d123321c62cbadcffca SHA-1: 93aaad850636f53030b0c341222918ab3fd699e3 SHA-256: 47e1a355a43cb01ffb1773853b4c8f7a821d386702229a3b249c07a4bac793d2
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://traffset.ru/strik?utm_term=city+car+driving+crack+2020 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4387718/normal_5fa010dcb5cef.pdfIn PDF document text
    • https://cdn.sqhk.co/bebumula/XhaieiB/table_tennis_coaching_classes_near_me.pdfIn PDF document text
    • https://pakoverixofe.weebly.com/uploads/1/3/4/7/134771358/vonamuvofe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421630/normal_5fa1f1071ee37.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403533/normal_5fbbef3c0abc8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393754/normal_5fc13e41b7b4b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408463/normal_5fa4304de61ff.pdfIn PDF document text
    • https://lomodujumozib.weebly.com/uploads/1/3/4/5/134588848/51b5d3.pdfIn PDF document text
    • https://cdn.sqhk.co/bisadumiza/yhcgdhf/kibuxe.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/satulibaren/44841465136.pdfIn PDF document text
    • https://s3.amazonaws.com/kubafezin/dulolonuwapim.pdfIn PDF document text
    • https://s3.amazonaws.com/xapidajovaji/fcpa_enforcement_report_for_q3_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/juzowilipi/9590671284.pdfIn PDF document text
    • https://s3.amazonaws.com/rurosaveruk/52868191305.pdfIn PDF document text
    • https://s3.amazonaws.com/satulibaren/organismo_ejecutivo_de_guatemala.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_off000115a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115A8 5300 bytes
SHA-256: 436bb9a1b39a6b653eb77b947122bc3aaedfcbb18b5037e5690e601c49348650
font_01_sfnt_off000127ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127CE 12136 bytes
SHA-256: 181ff21420e1dd279868bc8824f953cd689cc15a63798a974f52fc0528938853

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