Malicious PDF — malware analysis report

Static analysis result for SHA-256 afdf219c606270be…

MALICIOUS

PDF

97.1 KB Created: 2021-07-14 06:28:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: e86817c88a744def909731f4650cd9d5 SHA-1: d908184aa2d7848cc9bdd36837825b5ec4b70032 SHA-256: afdf219c606270be401c13c610ee1a4091698e1ac4b43377432fc0a392b6ce5e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as a link farm, with numerous URLs pointing to compromised WordPress sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the structure and URL patterns are consistent with malicious PDF lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://huntic.ru/uplcv?utm_term=live+life+to+the+fullest+bible+verse PDF link annotation
    • https://siphouse96.com/wp-content/plugins/super-forms/uploads/php/files/a49dbc26a2b4dc34f2247c1a58a3a208/20991509276.pdfIn PDF document text
    • http://aleeblog.com/wp-content/plugins/super-forms/uploads/php/files/blnr4jkr38l31hkm38ksc3s5s3/dezujenikumi.pdfIn PDF document text
    • http://slowjamsundays.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098839f21de0---39157577607.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/9c5731a4af96478ab75a323db7c8d1e5/39684999390.pdfIn PDF document text
    • http://magnumprint.ru/upload/files/3378701498.pdfIn PDF document text
    • https://jennysbooks.com/wp-content/plugins/super-forms/uploads/php/files/cbb74ae4c60359f44bfbee22d4653582/kizorudinalerazovamoxo.pdfIn PDF document text
    • https://francois-daulte.com/ckfinder/userfiles/files/resekuxonozeb.pdfIn PDF document text
    • https://yziact.fr/wp-content/plugins/super-forms/uploads/php/files/a0piabe0dh4eqd1r159mfpq20v/22339222791.pdfIn PDF document text
    • http://kwartetproforma.com/userfiles/file/66683339697.pdfIn PDF document text
    • https://vaytieudungtragop.com.vn/wp-content/plugins/super-forms/uploads/php/files/urbi97tbict0bssf3vosjsif26/rafamerezikisekexav.pdfIn PDF document text
    • http://hollywoodterrace.org/clients/863344/File/kagagokiminisu.pdfIn PDF document text
    • http://carneslaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/48506463270.pdfIn PDF document text
    • https://alatheir.com/atheirwsfiles/file/37847265856.pdfIn PDF document text
    • http://manufim.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160cb022f3d59d---guxiw.pdfIn PDF document text
    • https://mattweidnerlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0b2bd7957b---pevovigibadufakapi.pdfIn PDF document text
    • http://ptk-astana.kz/wp-content/plugins/super-forms/uploads/php/files/7c39480617161864dba56d817c4bead1/pujetovofolilejon.pdfIn PDF document text
    • http://sacmacbook.net/userfiles/file/54112209677.pdfIn PDF document text
    • https://thewentworthco.com/wp-content/plugins/super-forms/uploads/php/files/nrb512sovl5oikmtb0eo02hijp/37490603902.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_off000118c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118C7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000130d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130D9 18096 bytes
SHA-256: 10910892e87256a33c467aedb598e8422f0f05d6baa2c3035966dcb4391ae1ad
font_02_sfnt_off00016058.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16058 10308 bytes
SHA-256: 518ca0df26240e46304e7390dcd71a521357c25ace9b2e47cd32bbc45fffd381