Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d115931b4f24438…

MALICIOUS

PDF

70.3 KB Created: 2021-04-05 07:21:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7f4cf98c1d798befd082d3a14c82b6bf SHA-1: 7c0a1d5779d5ea49aa1904023e809794b34b440c SHA-256: 2d115931b4f2443867e90755da839171b772e2496bc113c086eb9814364c8f4b
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF document contains a large number of external links, many of which are disguised as search results for common login pages, suggesting a credential harvesting or phishing attempt. The presence of a password-protected archive lure indicates an attempt to bypass security controls. ClamAV detection and ML classification confirm its malicious nature, likely involving exploitation for client execution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://lozipotod.ru/wix?keyword=hotmail+com+login+my+account
    • http://ryduslim.website/7014240404ke6g2.pdf
    • https://tibuvaji.weebly.com/uploads/1/3/4/7/134720571/pelijarorimewe-vuwuril.pdf
    • http://excschool.ru/accu_chek_multiclix_lancet_how_to_useixm3w.pdf
    • http://physcoo.com/why_is_macbeth_curse_in_theater1u7p5.pdf
    • https://galekogikelubem.weebly.com/uploads/1/3/1/4/131438025/81c59081.pdf
    • http://nosinoski.shop/sofewumezagadelipijugs08g.pdf
    • http://mybestchan.online/20463238169rg5gc.pdf
    • http://about-igsupport.com/guboxejlh0qe.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://a161ff94-1a6f-4367-b6f8-8e513a5e676d.filesusr.com/ugd/4c7633_42d7f5eaf8f1472883bc7d27850e9313.pdf?index=true
    • https://s3.amazonaws.com/xezonijida/vekimigitexibomagiji.pdf
    • https://s3.amazonaws.com/niwotipugonuvoz/iq_test_questions_with_answers_sinhala.pdf
    • https://uploads.strikinglycdn.com/files/a1527bde-e31d-4ccd-aa61-572f6c6175bd/how_to_read_automotive_wiring_schematics.pdf
    • https://uploads.strikinglycdn.com/files/4bbe68c6-6bd5-438f-af9b-00e2919b91ad/kaxujutekuwadedotul.pdf
    • https://30c0d994-bee2-4d79-bc91-d4aaa7251653.filesusr.com/ugd/0962d9_2c0c6a6f12324464b6992ef964e05d01.pdf?index=true
    • https://uploads.strikinglycdn.com/files/6b4a8503-93af-4bf9-8e14-25f92cffa56d/21408509335.pdf
    • https://uploads.strikinglycdn.com/files/6500bf19-a328-4d69-b893-e2f0f47da360/6128659594.pdf
    • https://uploads.strikinglycdn.com/files/6f14535e-e2bc-428a-b59c-e7f8d9c98d42/riripofubi.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d90e.bin
80dde7770ea90f36bc2fccb1bfcf9e8b7897d35be6b23fe9b2cc36953b78d1dd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD90E 4908 bytes
font_01_sfnt_off0000e9b4.bin
75dc0597a45bb99f5329147dd676f2b2304842782d997f7798537a9bb6122b9c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE9B4 10152 bytes

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