Malicious PDF — malware analysis report

Static analysis result for SHA-256 e05745d7bdeb8a6a…

MALICIOUS

PDF

90.6 KB Created: 2021-09-06 20:29:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: e2fe13bd7d8e9524c7464ffe29fb4691 SHA-1: d666f95907d3429e766a574b8648cb526b071c46 SHA-256: e05745d7bdeb8a6a4505e09038e7b42a38286aaa1ec05754146ecc682bd05e7a
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The presence of embedded JavaScript and numerous links to compromised or disposable hosting sites indicates an attempt to redirect users to malicious content. The primary attack pattern involves a link farm designed to exploit users through compromised CMS uploads, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://crewmak.ru/uplcv?utm_term=bell+fibe+home+hub+2000+manual PDF link annotation
    • https://szabobuszrendeles.hu/files/files/wajopunobinesivuzesukigef.pdfIn PDF document text
    • http://www.etoiles-recrutement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d79a1c7d13---8343380538.pdfIn PDF document text
    • https://hanomanberjaya.com/contents/files/87070152224.pdfIn PDF document text
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/nsv46oica3ua3qj3egmdq06jk5/95892108892.pdfIn PDF document text
    • http://sincaremedicaltour.com/js/upload/suviniwewabibonun.pdfIn PDF document text
    • https://polresseluma.com/assets/ckfinder/core/connector/php/uploads/files/57118513826.pdfIn PDF document text
    • https://mobiligennari.com/userfiles/file/wanoxo.pdfIn PDF document text
    • http://netinflux.net/userfiles/file/junarilunibekopi.pdfIn PDF document text
    • https://rlvanstory.com/wp-content/plugins/super-forms/uploads/php/files/a040cbe2a1a073fb92bc4e5f3a7ee4b5/lolegapenabudopodo.pdfIn PDF document text
    • https://condominiobrisasdelnorte.com/userfiles/file/zutokosekejaduxaresej.pdfIn PDF document text
    • http://paramountswimwear.com/userfiles/files/9286713353.pdfIn PDF document text
    • https://vivekanandbawwa.com/userfiles/file/23605351904.pdfIn PDF document text
    • http://www.tenniscanberra.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16091efd7b9baf---52425968110.pdfIn PDF document text
    • http://sentezetutmerkezi.com/upload/ckfinder/files/20457822225.pdfIn PDF document text
    • http://verkoop-je-wagen.be/wp-content/plugins/formcraft/file-upload/server/content/files/1606c900c4fa37---pirelopokeku.pdfIn PDF document text
    • https://vmwarts.com/ecovic/file/pekepimavalitagopelaxun.pdfIn PDF document text
    • http://shuswapladystriders.ca/userfiles/file/jonilifa.pdfIn PDF document text
    • https://www.hintonassociates.com/wp-content/plugins/super-forms/uploads/php/files/9ccd75659fe9051c21f55d1c8562ee2d/76385943431.pdfIn PDF document text
    • http://suamayin.biz/userfiles/file/mesufibekipinajaruvuroza.pdfIn PDF document text
    • http://tea-ra.com/user_data/upload/save_image/files/wasazusigoj.pdfIn PDF document text
    • http://dalnoboy.org/data/filestorage/upload/files/84220498759.pdfIn PDF document text
    • https://qamarapps.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a450dca167f---kezixegas.pdfIn PDF document text
    • https://sharpspringwww.kinsta.cloud/wp-content/plugins/super-forms/uploads/php/files/223f07b58d4051b4006d009156905519/64213077799.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_off0000fdb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDB5 17852 bytes
SHA-256: 3fb6d20e427a8bb69b4c046df60ad17682eda4c8a30268670d7bea4a4a286bf6
font_01_sfnt_off00012c8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C8A 10648 bytes
SHA-256: 23440c99a808f6f537cf54e75a4658f76d061d5bf3cbc37787ec2dcdd69a9503
font_02_sfnt_off000144b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x144B5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1