Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc13467c38733ec5…

MALICIOUS

PDF

87.6 KB Created: 2021-08-01 17:56:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 691b1c99f3bba3fe2b852b418cbd5602 SHA-1: 43b5c188b4aac75ba61895cac140855c543f883d SHA-256: bc13467c38733ec511e634e87cc06a4e42aaf427f55a2ac6dc9bab8e4f12e916
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by multiple heuristics and a machine learning classifier, with ClamAV detecting it as Pdf.Phishing.Trojan. The embedded URLs and link farm heuristics indicate a phishing or scam attempt, likely to redirect users to malicious sites. The document body is heavily obfuscated, but the presence of numerous external URLs suggests the primary goal is to drive traffic to potentially compromised or malicious domains.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://ketchas.ru/uplcv?utm_term=2018+kawasaki+ninja+400+service+manual+pdf PDF link annotation
    • http://lhjmfamily.com/clients/5/5d/5d8645f74963a96e1aea25f3b610eff6/File/3212914759.pdfIn PDF document text
    • https://bbu.vn/Images_upload/files/33403639803.pdfIn PDF document text
    • http://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/160711da1b10e3---davidixepepemowuviginam.pdfIn PDF document text
    • http://tanriovermensucat.com/uploads/genel/files/78453439627.pdfIn PDF document text
    • http://www.hj-bouwt.be/wp-content/plugins/formcraft/file-upload/server/content/files/1607423068674b---winojotulakurawux.pdfIn PDF document text
    • https://birutelorasin.com/contents//files/sokusapipemuvesete.pdfIn PDF document text
    • http://studiodrago.eu/userfiles/files/forag.pdfIn PDF document text
    • https://ekaplast.site/admin/ckfinder/userfiles/files/xilep.pdfIn PDF document text
    • http://www.thelawchamber.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094cb64b5e4c---32552669360.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/a1fcaqse2jd5g8j5lrbjt61fp5/5338365071.pdfIn PDF document text
    • https://pabausa.org/wp-content/plugins/formcraft/file-upload/server/content/files/160849516d6e6b---64804285852.pdfIn PDF document text
    • http://self119.net/upload/userfiles/2021/06/files/210611110154.pdfIn PDF document text
    • https://upbilbao.com/ckfinder/userfiles/files/fifotetawoxazedawo.pdfIn PDF document text
    • http://vipavtoufa.ru/wp-content/plugins/super-forms/uploads/php/files/aa4b0d739aadfaf7f5bdc27ed146014d/xoxudezojubapa.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/1609c77fae3645---vimusorarubewozelaxibuma.pdfIn PDF document text
    • https://hazeloyun.com/calisma2/files/uploads/jejusudap.pdfIn PDF document text
    • http://mikomisushiwc.com/uploads/files/dexapewinonejijofemo.pdfIn PDF document text
    • https://prosegik.com/wp-content/plugins/super-forms/uploads/php/files/7e5af9031a1088baf95c9ecc13dd5f4f/basanibuxovinoj.pdfIn PDF document text
    • http://www.scsi.coop/wp-content/plugins/super-forms/uploads/php/files/adea57952584c995e98079f49c567284/lofemikisetedesufevuxo.pdfIn PDF document text
    • https://claphamjunction.com.au/wp-content/plugins/super-forms/uploads/php/files/ed5f10497297b1d4086f81cf15f0c403/33841710147.pdfIn PDF document text
    • http://abwferrellpkwy.com/uploads/files/kodepagajulaxojefosamida.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f05a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF05A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001086c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1086C 16952 bytes
SHA-256: 8f954c4f746e889a600b30ba6f54e3b9dc56492f51cbddb32a90ee13850ef0ec
font_02_sfnt_off000134a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x134A6 11520 bytes
SHA-256: ef978d254d58178e7df752dd67bb81cab00254f331c94a7445441568eb71d85e

Open this report in the interactive analyzer, or submit your own file for analysis.