Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa5f2a687bb4c199…

MALICIOUS

PDF

83.4 KB Created: 2021-09-01 07:48:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 9211d3b6962ca3880489f1532f2bc6d8 SHA-1: 1058685e4f497098c4e2b9482fe4e8fc3eccafaf SHA-256: fa5f2a687bb4c1993ed93f1b436178d8e11959138113385c918982fcb1a9083c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous external links, many pointing to compromised WordPress sites or disposable hosting, suggesting a phishing or scam attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. The primary attack pattern involves luring users to external, potentially malicious, websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://drafthe.ru/uplcv?utm_term=what+does+petty+mean PDF link annotation
    • https://zzwgjx.com/d/files/17437718281.pdfIn PDF document text
    • http://www.kevimotor-rock.hu/files/files/50867396705.pdfIn PDF document text
    • http://aep-tc.com/cache/fck_files/file/49036053555.pdfIn PDF document text
    • http://aksaxena.com/bpms/includes/fckeditor_uploads/userfiles/file/gowekedefemijekotof.pdfIn PDF document text
    • https://binarbaidrealestate.com/public_html/userfiles/file/tizibatijavozewezolibez.pdfIn PDF document text
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/fmkp89k75e903t00lqhu04k5o1/35403516299.pdfIn PDF document text
    • https://3dreamstudios.com/wp-content/plugins/super-forms/uploads/php/files/fa8a8a3df661e89b3243a934fbbf6456/xafokobori.pdfIn PDF document text
    • http://www.ambredore.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8675b68513---nekotegigagod.pdfIn PDF document text
    • http://wksx.top/images/userfiles/file/47603850774.pdfIn PDF document text
    • http://volamtuyetthe.com/userfiles/file/32609417655.pdfIn PDF document text
    • http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/16076a12c01545---15954043683.pdfIn PDF document text
    • http://blueyee.com/upload/file/152223594984.pdfIn PDF document text
    • http://www.airportlimofortlauderdale.net/wp-content/plugins/formcraft/file-upload/server/content/files/1606dc2e535ec3---jikajibijusasusit.pdfIn PDF document text
    • http://finproekt-msk.ru/userfiles/file/gasirug.pdfIn PDF document text
    • http://drinkandshrink.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16085aebc39cb1---71465818674.pdfIn PDF document text
    • http://janandpoos.com/clients/872640/File/mojopud.pdfIn PDF document text
    • http://serendipityorlando.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d25d73260a5---73226488401.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/016b9cdaaf0467a23490bcf4f3a46750/wajixeluzewoxomevaxadi.pdfIn PDF document text
    • http://mrbossamktown.com/uploads/files/12264066011.pdfIn PDF document text
    • http://www.ville-dammarie.com/ckfinder/userfiles/files/63953143572.pdfIn PDF document text
    • http://asu.com.vn/wp-content/plugins/super-forms/uploads/php/files/g93dvutghc8rntkc5tehno6njp/41565959454.pdfIn PDF document text
    • https://brakos.it/file/nevuvadamajinegizunat.pdfIn PDF document text
    • https://shining4u.com/wp-content/plugins/super-forms/uploads/php/files/4914d65d6e9b32fa8054bd95c76b1ffe/81488477188.pdfIn PDF document text
    • http://dynamic1984.com/user_file/file/vadifuguxawaluvizujidodo.pdfIn PDF document text
    • http://phyllisrubensteinlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/nitolusaroku.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_off0000deb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEB2 10528 bytes
SHA-256: a501f5a10258b100d9e9bdffc4034ad7c448d78f588b73466c5c3f916dde94b7
font_01_sfnt_off0000f689.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF689 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010e9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E9B 18916 bytes
SHA-256: 9912877f96c4a74c2a67224bafc1438ac5e97eacb70155576762bb4f7dc1560b