Malicious PDF — malware analysis report

Static analysis result for SHA-256 80a04b9a435b4eef…

MALICIOUS

PDF

87.7 KB Created: 2021-03-09 14:17:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: deef26e85773ae8b4418238ee1d67ebd SHA-1: c93bc8ea7686835898f72d1dc19cf12f15aa8c4d SHA-256: 80a04b9a435b4eefb6f4907074713829032058542825ce132ff926440babcca6
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing or SEO link farm attack. It contains numerous external links, with a primary suspicious URL pointing to a domain associated with a 'bikini body guide review'. The document body is heavily obfuscated, but the presence of external links and the heuristic firings suggest an attempt to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://kuzutuzo.ru/award?keyword=bikini+body+guide+review+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4418381/normal_601a2334b5ca9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4401694/normal_5fee46f288b17.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404113/normal_5fd92401da515.pdfIn PDF document text
    • http://khanapoorti.com/90812747044jse2b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457272/normal_6035bf1081679.pdfIn PDF document text
    • http://santand-es.com/70804312713e38dp.pdfIn PDF document text
    • http://worldworkbook.com/817274134516opxl.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/pululusodogi/simatobufazedobadu.pdfIn PDF document text
    • https://s3.amazonaws.com/vatosolikijike/benapuzu.pdfIn PDF document text
    • https://b86313a8-447b-404d-ae6d-bc69740d899e.filesusr.com/ugd/e54fc7_710fcba1b5fc4f03849d642957720cc6.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/feliso/dawafunesevepek.pdfIn PDF document text
    • https://5e3b32e6-a537-4a58-a531-ef303a468713.filesusr.com/ugd/120874_d0b8d590e73c44e6871a6d230f36bb9b.pdf?index=trueIn PDF document text
    • http://pigozezidum.rf.gd/gozujisobebo.pdfIn PDF document text
    • http://liwusetokabozil.epizy.com/45110275303.pdfIn PDF document text
    • https://s3.amazonaws.com/rerinago/monthly_expense_report_quickbooks.pdfIn PDF document text
    • https://s3.amazonaws.com/simujix/xosaxodiwuwesezonota.pdfIn PDF document text
    • https://s3.amazonaws.com/xiwevitox/10655923580.pdfIn PDF document text
    • https://s3.amazonaws.com/wiwamoxamo/armies_of_sand.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f7ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7BA 5296 bytes
SHA-256: 0049993ff4f475b8baf6994e56048f957cc5558f3fc9c766a62b291b10ffd4dc
font_01_sfnt_off000109e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109E8 2672 bytes
SHA-256: e5cddb63868e4432b627bcd2b1b1b83b88da3401011fdebe7adee86ffc3ea130
font_02_sfnt_off0001155e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1155E 10476 bytes
SHA-256: ce4fcd7e8b1fc10da63a7677705564dd3f2a84f6a1c5636cabd92a632117925a
font_03_sfnt_off0001396c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1396C 16828 bytes
SHA-256: bee5e04417e0acd95b53a71197117cfebd8bf5311fb972af97b4aea93ff6cf9d

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