Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0d8b2e53a4224c1…

MALICIOUS

PDF

86.3 KB Created: 2021-09-04 02:06:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 29d6bd8d6f6a19dfaca28e07e1b6da28 SHA-1: 1030941f4880d7f82236c33bf488eb40003921c6 SHA-256: e0d8b2e53a4224c10526b855dcc7efda70fce7abcb3612c19d98a4509d454027
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links, many pointing to potentially compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The document body is heavily obfuscated and unreadable, providing no direct user-facing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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 http://grabnerestriche.at/17184616432.pdf In PDF document text
    • http://oneself.pro/wp-content/plugins/formcraft/file-upload/server/content/files/160f0cb8d84f27---9099135295.pdfIn PDF document text
    • https://episcopiaoradiei.ro/files/92933864125.pdfIn PDF document text
    • http://microsolder.hu/userfiles/files/petinafo.pdfIn PDF document text
    • https://assignmentmart.com/ckfinder/userfiles/files/zakodiro.pdfIn PDF document text
    • http://staractivecollection.com/resimler/site/files/91468856901.pdfIn PDF document text
    • https://lecapsuledigian.it/file/gatubuwikela.pdfIn PDF document text
    • http://kaitosushisb.com/uploads/files/70368675690.pdfIn PDF document text
    • https://shrmivirtual.org/wp-content/plugins/super-forms/uploads/php/files/ba937e42f72ae6108076ad2286505fc0/69301948081.pdfIn PDF document text
    • http://dermalab.pl/userfiles/file/tenurukus.pdfIn PDF document text
    • http://banghetretruc.com/media/ftp/file/zasutonotafoxisuzu.pdfIn PDF document text
    • http://jfkanacon.org/data/userfiles/files/22247225310.pdfIn PDF document text
    • https://keralatemples.info/ckfinder/userfiles/files/14922683251.pdfIn PDF document text
    • https://brothers-music.com/ckfinder/userfiles/files/32483582504.pdfIn PDF document text
    • https://siyata.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160cf1bd166aff---95865554022.pdfIn PDF document text
    • http://ilyxrace.com/userfiles/files/jevefanipeniwevivuzuzo.pdfIn PDF document text
    • http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/160a539b9b59ba---wetajisimuvopawaxebotafiv.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160715f253f36c---3174560655.pdfIn PDF document text
    • https://lostsoulsmemorialnj.org/wp-content/plugins/super-forms/uploads/php/files/5ca4f1b95d76a9e3dcbcc7c91e89d180/tapuzujisimopetigepixozu.pdfIn PDF document text
    • http://s8radziejowice-paszkow.pl/userfiles/file/musenodipezusifixo.pdfIn PDF document text
    • http://learningkey.org/userfiles/314946293.pdfIn PDF document text
    • http://www.goataxiservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7fc4266276---2693595041.pdfIn PDF document text
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c88a98c258---15904667447.pdfIn PDF document text
    • https://qamarapps.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e0a3e644fc---vuvosumexir.pdfIn PDF document text
    • http://ash-graphy.com/userfiles/file/moweputumufujaki.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=ik+multimedia+axe+i%2Fo+manualPDF link annotation
    • 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_off0000ea46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA46 10420 bytes
SHA-256: 74331865c345cc70764853cea13943b9ffbefd7f11c6930a743068390156f857
font_01_sfnt_off000101e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101E3 18812 bytes
SHA-256: 9e9af24fef10abedf51bf2ffc8779d555754287bf47374a63820f3cac863e134
font_02_sfnt_off00013373.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13373 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1