Malicious PDF — malware analysis report

Static analysis result for SHA-256 67c00d8742eca74e…

MALICIOUS

PDF

125.6 KB Created: 2021-03-18 17:56:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 92c13892a2d82128d520fc4240e2ec73 SHA-1: 532e1ee108aa9b51ee85c0b503f6e9b6460b170d SHA-256: 67c00d8742eca74e82ccee6bf0713aea7be5fc0c0b827ac7acb72cea542d199c
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to potentially malicious domains, as indicated by the 'PDF_SEO_LINK_FARM' heuristic and the 'ML_NYX_PDF_MALICIOUS' and 'CLAMAV_DETECTION' firings. The document body, though heavily obfuscated, appears to be a lure related to biblical numerology, suggesting a phishing or malware distribution attempt. The presence of embedded URLs and the overall structure strongly suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://jumiwimov.ru/strik?utm_term=what+does+the+number+803+mean+in+the+bible
    • https://cdn.sqhk.co/gafisasiwu/jgBidhc/amc_movies_stockbridge_ga.pdf
    • http://gapijet.scienceontheweb.net/oxford_english_for_computing_teacher_s_book.pdf
    • https://zogopovedizojux.weebly.com/uploads/1/3/1/4/131408172/4361999.pdf
    • https://static.s123-cdn-static.com/uploads/4458840/normal_6006f9245953f.pdf
    • https://falopizesolirod.weebly.com/uploads/1/3/1/3/131379111/domuwep.pdf
    • https://sagolofuba.weebly.com/uploads/1/3/4/8/134873879/suviluxomol.pdf
    • https://cdn.sqhk.co/fabokofe/ghhgdhe/lutamibutuxitakijubuv.pdf
    • https://panezoso.weebly.com/uploads/1/3/4/6/134697542/rolidexatonedar.pdf
    • https://wufikasuruxur.weebly.com/uploads/1/3/1/6/131636700/fimufomakiv.pdf
    • https://cdn-cms.f-static.net/uploads/4476596/normal_5fe82887410ba.pdf
    • https://mixidesurujof.weebly.com/uploads/1/3/4/9/134902607/f2fb62.pdf
    • https://tanoviruxejalun.weebly.com/uploads/1/3/0/7/130775892/ec7629183b4f.pdf
    • https://cdn-cms.f-static.net/uploads/4420459/normal_604b9fe4b1af8.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://pulutugorivexek.atwebpages.com/what_is_meant_by_functional_education.pdf
    • http://revudipepofaten.myartsonline.com/how_to_become_a_certified_eyelash_extension_trainer.pdf
    • https://s3.amazonaws.com/luborinizu/74439741501.pdf
    • https://s3.amazonaws.com/tajimipojimo/12519864531.pdf
    • https://s3.amazonaws.com/sugowubuf/kepijekuvixararewoviketi.pdf
    • https://s3.amazonaws.com/sikuva/11757927634.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00019b06.bin
998a3ae91ac9fc003ed64a694a9dbe53b909080efc8be26a91a60db0b07fd90b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x19B06 5716 bytes
font_01_sfnt_off0001ae51.bin
1ee08e913779ea8656307f1031df7b6d84caf485d5a8bafd5e04d8f28bd36670		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1AE51 10668 bytes
font_02_sfnt_off0001d308.bin
532315dfdc59b350d447ad91845dd8cc72a836e684f536ab9a4305dc5b53fb8e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1D308 16204 bytes

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