Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d6dece0e308f15e…

MALICIOUS

PDF

79.4 KB Created: 2021-09-03 14:22:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 0f5b47207a9ee51d6927e40482147e1a SHA-1: 4d40028baaf7f38d03c1d88c786e37c6b5911e13 SHA-256: 2d6dece0e308f15e928522c452b21dd22690ae4c4173e4b4573fee53175916e2
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Several heuristics point to the document being a link farm, with many URLs hosted on compromised WordPress sites and disposable domains. The presence of embedded URIs and the overall structure suggest it's designed to redirect users to potentially harmful content, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://philabc.ru/uplcv?utm_term=hospitality+industry+%28general%29+award+2010+pdf+2017 PDF link annotation
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a92f7b6cab1---sofulagodisarezofozavuge.pdfIn PDF document text
    • https://qamarapps.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610613a40bbb8---tikurek.pdfIn PDF document text
    • http://sparkpro.lv/content/file/kelanu.pdfIn PDF document text
    • https://www.channeloflove.com/ckfinder/userfiles/files/vamila.pdfIn PDF document text
    • https://stefandes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bb75cc17ea---73023652774.pdfIn PDF document text
    • https://foulardfotografando.it/file/18763950210.pdfIn PDF document text
    • https://www.hintonassociates.com/wp-content/plugins/super-forms/uploads/php/files/31b38f1ae9ad47efe40c4eba5b478bbf/87029991168.pdfIn PDF document text
    • http://averon.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1606c78c9e249c---nukekaxiresekomiz.pdfIn PDF document text
    • http://bagiez.com/userfiles/file/jiwifigojubuditosuremes.pdfIn PDF document text
    • https://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b34433e74b8---18105737066.pdfIn PDF document text
    • https://israelonthehouse.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ad292113fc---61183409170.pdfIn PDF document text
    • https://gulertrafik.com/wp-content/plugins/super-forms/uploads/php/files/rtrcjhgm5k2tpiie8c10f5osrj/vowovusaxinifinosoge.pdfIn PDF document text
    • https://komunalno-vrgorac.hr/files/12693549252.pdfIn PDF document text
    • http://soldearenales.com/galeria/files/46555482267.pdfIn PDF document text
    • http://www.gainerwindows.ca/wp-content/plugins/super-forms/uploads/php/files/v46fegv9iklfc2djicg3n56bf6/76310703026.pdfIn PDF document text
    • http://henri-ruch.ch/doc_pub/file/65315585825.pdfIn PDF document text
    • http://blueyee.com/upload/file/272016189364.pdfIn PDF document text
    • http://kxqcgs.net/filespath/files/20210814155917.pdfIn PDF document text
    • http://benetworkingpro.com/ckfinder/userfiles/files/dewikebivabimipof.pdfIn PDF document text
    • https://coaching-jk-academic.com/ckfinder/userfiles/files/13896497033.pdfIn PDF document text
    • https://biholka.cz/uploades/userfiles/file/68904428869.pdfIn PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/160812b27c45bf---76235421006.pdfPDF link annotation
    • http://2446665a.ru/ckfinder/userfiles/files/67987505967.pdfIn PDF document text
    • https://admonks.ru/wp-content/plugins/super-forms/uploads/php/files/b7a3eee7df76f8524ca9479da8e8f7a7/63189977074.pdfIn PDF document text
    • https://psychotherapie-dr-albrecht.de/wp-content/plugins/formcraft/file-upload/server/content/files/160d1d643f0574---damufularukizulefifa.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_off0000cee0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEE0 17420 bytes
SHA-256: 0cac9f0add12c75e3a293bde662697c8a2a63c5ddcd0c674cccecdf11c60471f
font_01_sfnt_off0000fb92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB92 11464 bytes
SHA-256: a2968a2aa3ee2e19f0492ba8a40730b5d718bf28320b47efeaf7586df7252981
font_02_sfnt_off000116e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116E2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1