Malicious PDF — malware analysis report

Static analysis result for SHA-256 47747093d424c9f3…

MALICIOUS

PDF

57.6 KB Created: 2021-06-24 12:55:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 93130a5fecfded4265859dfbce1b23a0 SHA-1: e93c43d74210d61d9871eba317c99955a9bb49a3 SHA-256: 47747093d424c9f38d7c6a74c1882b834b6470fba681974ba8f612c08632bc9b
156 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, suggesting a link farm or phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs point towards an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://allytemp.ru/uplcv?utm_term=converting+electron+volts+to+joules PDF link annotation
    • https://www.indoorclub-informa.com/boletines/img/file/70527054501.pdfIn PDF document text
    • https://victorybear-info.com/userfiles/files/falubusane.pdfIn PDF document text
    • http://www.idenet.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c8687470038---bosizajemebanovuromojeta.pdfIn PDF document text
    • https://eravukappalpalli.com/userfiles/file/jigiwexukiwasisibux.pdfIn PDF document text
    • https://hpx.com.ua/wp-content/plugins/super-forms/uploads/php/files/f9a0065d2c8b2deac872178f0b430dd5/girilafizogetazaxeg.pdfIn PDF document text
    • http://www.altrus.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc23005ac5---xajonowula.pdfIn PDF document text
    • http://tydafa.com/dafa/uploadfiles/20210619030029.pdfIn PDF document text
    • http://aaaexpressac.com/userfiles/file/xunasuvidomuf.pdfIn PDF document text
    • https://traveltokiev.com/wp-content/plugins/super-forms/uploads/php/files/gi3p2spsi074lpq6rbl3omv2a7/kutozokufisunagez.pdfIn PDF document text
    • http://sarahscupcakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bcedd04c0c---wokovifetiramofaj.pdfIn PDF document text
    • http://la-roofers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16086a84cb715e---89517889159.pdfIn PDF document text
    • http://countrysquirefoods.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f4dac42c12---juwuguwekolavelowinivi.pdfIn PDF document text
    • https://whiteplacard.com/UserFiles/file/31704979658.pdfIn PDF document text
    • https://www.ideaklinikkadikoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160706b44508ef---55377103159.pdfIn PDF document text
    • https://mission4recruitment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160addc5230771---1565263481.pdfIn PDF document text
    • http://hum-lucknow.org/test/fckeditor/file/betasawevixuvelovalifupo.pdfIn PDF document text
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/be153943d93997a9f4237fa20e4c7d12/85962071848.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000ab06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAB06 4800 bytes
SHA-256: 35b69ee7501a4241ece5f70b6721bbe3829428cfdc89a57f77abf5f1b24211df
font_01_sfnt_off0000bb78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB78 8864 bytes
SHA-256: 5e65f371d9c1dc7ff9dc51e54cc9bc1e6aec1b92256cf220b69ef08f465ba17b