Malicious PDF — malware analysis report

Static analysis result for SHA-256 85faebbab1a1f882…

MALICIOUS

PDF

77.0 KB Created: 2021-07-30 20:57:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 6d1adc8ed1845439ce5c3288c81396c2 SHA-1: 1792f1f1cda32d238d0dc6db7663b629cfdf9e85 SHA-256: 85faebbab1a1f882ddaf01befeb648d8426bcd20fd97289dfb0342f54ec58436
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, indicating malicious intent. It functions as a link farm, directing users to numerous external websites hosted on potentially compromised or disposable domains. The presence of external URIs and link farm indicators suggests the document is designed to lead users to phishing sites or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://philabc.ru/uplcv?utm_term=what+is+segmental+and+somatic+dysfunction+of+rib+cage PDF link annotation
    • http://fotomil.pl/ckfinder/userfiles/files/21875368225.pdfIn PDF document text
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/e4c54i90d4gkf5nquadjt48c21/magokaxizozixitonel.pdfIn PDF document text
    • http://atallmed.com/userfiles/files/fuvubopata.pdfIn PDF document text
    • https://k9-warrior.com/wp-content/plugins/super-forms/uploads/php/files/m4pdv9ust3b1jfo4g8rrhrudpn/munurabalubaxalebi.pdfIn PDF document text
    • https://www.synergyheart2heart.team/wp-content/plugins/super-forms/uploads/php/files/i4esuhaecl015eclnpbemu8g0r/82505708556.pdfIn PDF document text
    • https://kocarbonag.com/luutru/files/92131026810.pdfIn PDF document text
    • http://mu-rrrc.com/userfiles/file/51777632839.pdfIn PDF document text
    • http://women-for-marriage.com/ckfinder/userfiles/files/29618879264.pdfIn PDF document text
    • http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/1608d014c91614---fanelolasawebegowoj.pdfIn PDF document text
    • https://readxyz.com/wp-content/plugins/super-forms/uploads/php/files/2aa390e4d4e628761d44bc87fa2b3bb4/bebibadiwuzi.pdfIn PDF document text
    • https://floraplant.gr/FCKeditor/userimages/file/80318475961.pdfIn PDF document text
    • https://joyfool.art/wp-content/plugins/super-forms/uploads/php/files/d194a3b264c424c49094235779fef99e/xurupu.pdfIn PDF document text
    • http://www.fattyweng.com.sg/wp-content/plugins/formcraft/file-upload/server/content/files/16077c4239b311---lulakumekukivirefefefanuv.pdfIn PDF document text
    • http://thucancakoihikari.com/luutru/files/zofefagov.pdfIn PDF document text
    • http://www.theflightfest.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086ed712c1fc---84123840449.pdfIn PDF document text
    • http://curry-box-deluxe.de/userfiles/file/bozejedevupo.pdfIn PDF document text
    • http://dgjst.com/upfile/file/lezutew.pdfIn PDF document text
    • https://theshairpodcast.com/wp-content/plugins/super-forms/uploads/php/files/e3251eb3bd7faf3511a78c279ecf20b0/26194716864.pdfIn PDF document text
    • http://cck-brno.cz/ckfinder/userfiles/files/53323357319.pdfIn PDF document text
    • http://ahs1968.com/clients/d/dc/dcea35c349c70fb55dca458fc6558ff6/File/lobimupuduzi.pdfIn PDF document text
    • https://assurancemauricie.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f881b5c420e---pumojusenojet.pdfIn PDF document text
    • https://petikdaun.com/contents//files/leguravelat.pdfIn PDF document text
    • https://aljazeerahdrilling.com/userfiles/files/madari.pdfIn PDF document text
    • https://nirmalujjwal.com/public/ckfinder/userfiles/files/51811963091.pdfIn PDF document text
    • https://fibaquitaine.fr/cebatrama/userfiles/files/79943404250.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c8f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8F2 16052 bytes
SHA-256: f1d8fe917aa78e2e34eee5b255fcf8b8f151ae30523ca1315bf131c20f372428
font_01_sfnt_off0000f292.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF292 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010aa9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AA9 11268 bytes
SHA-256: 63484001ff238c8dfd3d62b3c1e94d9b3236f9e3247aaf9d520eb58674700aae

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