Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ed8b66f222f50bd…

MALICIOUS

PDF

75.3 KB Created: 2021-03-29 12:24:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 000775df63240151ec4d5e8faf0b5a49 SHA-1: 9542a2cff524506f0506a2e713a326687757176f SHA-256: 2ed8b66f222f50bd2cc6d694aebd8169597a13930fc3346b49af105e9ef69d62
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains a significant number of external links, many pointing to disposable hosting, indicating a link farm or SEO manipulation tactic. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://soxebez.ru/wix?keyword=sniper+assassin+apk+android+oyun+club PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4493195/normal_601e911b7c118.pdfIn PDF document text
    • http://dekiweragaf.mywebcommunity.org/calligraphy_practice_sheets_free_download.pdfIn PDF document text
    • https://lusizemanu.weebly.com/uploads/1/3/4/1/134108609/nakom.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491671/normal_6009d17817317.pdfIn PDF document text
    • http://mowefopovog.mywebcommunity.org/the_dead_sea_scrolls_study_edition.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407100/normal_5feba50cc7c99.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425909/normal_600c85f76670b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460063/normal_5fcacb44cc579.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495262/normal_6003534d50786.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4503584/normal_6024b0cfc2a19.pdfIn PDF document text
    • https://dufemejilesola.weebly.com/uploads/1/3/1/4/131453127/5227226.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/872e421e-63cd-41c0-ac38-dce49e00f4a7/different_types_of_engineering_drawings_and_how_they_interrelate.pdfIn PDF document text
    • https://27158da8-170d-48ca-a528-b8ced62fe517.filesusr.com/ugd/9fc8c3_a87f27599b874967a4b8a2cad4f88890.pdf?index=trueIn PDF document text
    • https://5d3a357a-25b2-4459-9cd8-210b235f7b36.filesusr.com/ugd/45e30f_dd7e1eb273c849e6b864b95817767d83.pdf?index=trueIn PDF document text
    • https://53ebb62d-ddaf-432f-8dc3-1f4746653467.filesusr.com/ugd/bbd3cf_01d7ba1ec23c43b793a24d88b0deb749.pdf?index=trueIn PDF document text
    • http://sakogabutal.onlinewebshop.net/present_perfect_tense_exercises_for_beginners.pdfIn PDF document text
    • https://e22e8d81-f41f-4d51-abb1-39b19d2d32bb.filesusr.com/ugd/96bf9d_4b78a81254b84297b962014707d1f2cc.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c70f422-9782-4526-8f51-890b70ec9057/disijepekalemepik.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac1b3d27-3400-46ac-b65f-d44801cccb68/80728296452.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c3f4a217-4c11-499c-b731-37aaf2aaf26a/bushnell_neo_ghost_golf_gps_manual.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e5e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5E6 5476 bytes
SHA-256: e885070409c2a7044ea60c725cc5a5c69f74dda5c3af47599a23807cfdfb43cb
font_01_sfnt_off0000f891.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF891 11808 bytes
SHA-256: 3c1ab3e24de0b89dbf1d22e989e3b232086381db4b7969469ab441f5e00b4f00