Malicious PDF — malware analysis report

Static analysis result for SHA-256 2754d36332e7f69a…

MALICIOUS

PDF

80.9 KB Created: 2021-09-21 12:44:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 0d3268518f5ed9dccb4a24183599e8c0 SHA-1: 64b6ed34ddf86e0e4a50978585f47d94c7bba2c9 SHA-256: 2754d36332e7f69a73f98805acd6b4b5e6cbba9b603acfc522f87218641ad8ae
204 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier with high confidence. It contains embedded JavaScript, which is often used to exploit vulnerabilities or redirect users to malicious sites. The document also links to multiple compromised websites, including WordPress upload directories, indicating a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 8

  • PRC/3D content in PDF high CVE related PDF_PRC_3D
    PDF contains PRC 3D content. PRC/U3D parsers have been a recurring Adobe Reader attack surface; treat as a related parser-exploit indicator rather than a specific CVE match.
  • 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.
  • 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://queure.ru/uplcv?utm_term=where+to+find+trash+bin+in+android PDF link annotation
    • https://granitnet.hu/editor_up/6150588296.pdfIn PDF document text
    • https://transcendenceit.com/wp-content/plugins/super-forms/uploads/php/files/18676503417e3c93b71032b3c10020fc/79986949462.pdfIn PDF document text
    • http://www.macrolepidoptera.hu/userfiles/files/33207496577.pdfIn PDF document text
    • http://speednewslive24.com/assets/ckfinder/core/connector/php/uploads/files/sarawiwavivigunaveze.pdfIn PDF document text
    • http://sevinctekstil.com/resimler/files/63881236079.pdfIn PDF document text
    • http://xn----dtbhwhggdaoqfh3d.xn--p1ai/media/file/zuduvibowemapaka.pdfIn PDF document text
    • https://tuabogadoangel.com/wp-content/plugins/super-forms/uploads/php/files/f101a5c76bf71b4bcc8d5088f0c72b21/41462967675.pdfIn PDF document text
    • http://champaigncursillo.com/userfiles/file/gexunabifolinezuzam.pdfIn PDF document text
    • http://eternalcycle.com/FCKFiles/file/besekakarel.pdfIn PDF document text
    • http://beloezoloto.ru/userfiles/file/75402471050.pdfIn PDF document text
    • https://hetodon.com/fckeditorfiles/file/fijivamezoxudafotonexep.pdfIn PDF document text
    • http://j1ent.com/userfiles/file/20210914122535.pdfIn PDF document text
    • https://brusroom.com/wp-content/plugins/super-forms/uploads/php/files/1756675d968c63ba9f64dd488dc5415c/83977174071.pdfIn PDF document text
    • https://medosojewellery.com/userfiles/files/29907419885.pdfIn PDF document text
    • http://poetische-malerei.de/web/editor/files/wuxeb.pdfIn PDF document text
    • http://garage-fuji.jp/js/upload/files/43702606311.pdfIn PDF document text
    • http://finchamauto.com/pics/11649092975.pdfIn PDF document text
    • http://pcccphucvinh.com/upload/files/sabug.pdfIn PDF document text
    • http://milkyway-vn.com/upload/files/vapamu.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_off0000da71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA71 10536 bytes
SHA-256: bae4c2427914186fa6e29f4a0019b71e578fa51f6219c991f847679479e94c84
font_01_sfnt_off0000f26f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF26F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010a81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A81 16848 bytes
SHA-256: 2305e0b4a19108c6fe5f12a05dddf11b71b356745541a55a76112188b3bbc078