Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0d2969fcc10b818…

MALICIOUS

PDF

85.8 KB Created: 2021-07-15 12:07:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 1c24b671134997d654f55ba3b8029951 SHA-1: 71ac5d17b94a4665352d7f70730651b24c6cedf1 SHA-256: a0d2969fcc10b81801dd320f19de94d89373f23c17e6407e3de5881755855ea6
216 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document exhibits characteristics of a phishing lure, specifically employing a password-protected archive scheme to conceal malicious content. The presence of numerous external URLs, many hosted on compromised WordPress sites or disposable domains, suggests an attempt to distribute malware or redirect users to malicious sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely involving the delivery of a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://huntic.ru/uplcv?utm_term=export+pdf+as+text PDF link annotation
    • http://technocom.pl/editor/file/wisirojaxij.pdfIn PDF document text
    • https://akita-inu.lv/www/files/files/pupixax.pdfIn PDF document text
    • https://bustotoronto.com/userfiles/file/dewofum.pdfIn PDF document text
    • http://apexhealthnutrition.com/newerac2c/userfiles/file/21251147361.pdfIn PDF document text
    • https://wills.sg/wp-content/plugins/super-forms/uploads/php/files/df7e73993dbb51a98c72421c81c77fbe/2216690962.pdfIn PDF document text
    • https://promocionesnma.com/wp-content/plugins/super-forms/uploads/php/files/dfe5614b4c025527af85edbbcfddf8d8/nofuwovabujemi.pdfIn PDF document text
    • https://www.cukoyem.com.tr/wp-content/plugins/super-forms/uploads/php/files/ri84buk0gdls2fj5kmnb6prjr4/98738688337.pdfIn PDF document text
    • http://fsoa.cn/userfiles/file/87850924622.pdfIn PDF document text
    • https://www.surajinformatics.com/wp-content/plugins/super-forms/uploads/php/files/ff0a65a361facfa7d4211051092d7e97/54148265742.pdfIn PDF document text
    • http://langfordfinancialservices.com/userfiles/files/58485507576.pdfIn PDF document text
    • https://www.sixteengrams.com/wp-content/plugins/super-forms/uploads/php/files/2djc7nlk49ldvtbj1cnsmi044p/16212359767.pdfIn PDF document text
    • https://ebooksweb.net/files/file/95038848930.pdfIn PDF document text
    • https://zemiigori.com/uploads/file/kikefanixewev.pdfIn PDF document text
    • https://humicdp.com/uploads/2021-07-08/images/files/50682730731.pdfIn PDF document text
    • https://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f1b9230f70---seduzamezojemazatodije.pdfIn PDF document text
    • http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073db27b363b---vetuziwojosutasijen.pdfIn PDF document text
    • http://melissajacksonmd.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070e17ae43a6---97956459950.pdfIn PDF document text
    • http://kusadasidentalclinic.com/img/userfiles/files/11833218760.pdfIn PDF document text
    • http://dentish.ru/ckfinder/userfiles/files/28584363780.pdfIn PDF document text
    • http://clear-es.net/yamituki-n/uploads/files/buwarawid.pdfIn PDF document text
    • http://szakkepzosiklos.hu/upload/file/2702662237.pdfIn PDF document text
    • https://wineart.online/userfiles/file/gizanam.pdfIn PDF document text
    • https://www.zaantraining.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608b177102f94---56396552437.pdfIn PDF document text
    • http://www.petersmetalstitching.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1608748e6d84c6---27857828810.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_off0000ebec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBEC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010403.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10403 10332 bytes
SHA-256: df85e558a77780d51a37453b828cffdddd31379192d40f5eed0a9304eb13efec
font_02_sfnt_off00011b75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B75 18092 bytes
SHA-256: c66d812c5be03286bf0a5b208901922087126b7d491f46abef5efe0edaefca0f

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