Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc0338c765e1fd3e…

MALICIOUS

PDF

68.2 KB Created: 2021-03-06 03:08:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 40cb2c36a2c2920a200f341f9ae29d9e SHA-1: 506d3e3f03fcca75eb19f843531f2055cdc2817c SHA-256: cc0338c765e1fd3ea5e9d7c943aab35f153fcdf242b051e9c36d93bfb8d88b3b
156 Risk Score

Malware Insights

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

This PDF document, masquerading as a technical diagram, contains a significant number of external links, indicative of a link farm or phishing campaign. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the PDF structure itself is suspicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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
  • 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://ponafet.ru/123?utm_term=toyota+tundra+radio+wiring+diagram
    • https://cdn.sqhk.co/reriwoduriju/YBigivJ/96348216866.pdf
    • https://zuxibonidape.weebly.com/uploads/1/3/4/8/134889984/ludapavepexut.pdf
    • https://bomaripuxizidul.weebly.com/uploads/1/3/4/9/134901287/74b66f2d9455.pdf
    • https://gagetagij.weebly.com/uploads/1/3/2/6/132695244/lilemitapej.pdf
    • https://sogitinavebifi.weebly.com/uploads/1/3/5/4/135400198/dosefu.pdf
    • https://cdn.sqhk.co/juselivo/anAG0gj/disarm_joker_bombs_fortnite.pdf
    • https://xugilatopuke.weebly.com/uploads/1/3/4/7/134746985/a2fd469ee.pdf
    • https://cdn.sqhk.co/xolofiwano/iGiiOPH/xifuze.pdf
    • https://komijeji.weebly.com/uploads/1/3/1/6/131606126/43a3290602cd20.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/4f665216-4a9d-4695-9bec-6378145612ce/jizinudiralokiza.pdf
    • https://uploads.strikinglycdn.com/files/700d0ebf-f03a-4be9-a4a7-7c62a343a866/calories_in_bojangles_cajun_filet_biscuit_combo.pdf
    • https://uploads.strikinglycdn.com/files/f5818c87-a435-417d-858b-9d131279ebc0/83798763604.pdf
    • https://uploads.strikinglycdn.com/files/5a01607e-244b-49ef-a147-d0df06b3aea6/traducir_manual_de_funciones_en_ingles.pdf
    • https://uploads.strikinglycdn.com/files/fd7a0b02-84b9-4536-95b0-ed00fa92b1f9/5146391573.pdf
    • https://uploads.strikinglycdn.com/files/37917f7b-b2ca-4e8a-bede-fd797f4a6079/73384088977.pdf
    • https://uploads.strikinglycdn.com/files/fb07fc59-5481-46cd-97f0-a5352b9ffc21/vedejuleguwixoduxi.pdf
    • https://uploads.strikinglycdn.com/files/a745bc06-87df-4d52-bd82-ae91378c179f/13819052362.pdf
    • https://uploads.strikinglycdn.com/files/29618efb-ae98-4840-a543-36d3602ec68b/how_to_become_a_computer_hardware_technician.pdf
    • https://uploads.strikinglycdn.com/files/ad11208b-392c-44eb-94ea-d3ced7cdc057/does_mind_power_work_solo.pdf
    • https://uploads.strikinglycdn.com/files/21f22ae2-95d7-40b9-895a-ad34d7e7780d/mainstays_bathroom_space_saver_assembly_instructions.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_off0000d0a1.bin
6c74ac6be34d52cac262979c49571eca681750f120df636d7a49c360acdcf097		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD0A1 5076 bytes
font_01_sfnt_off0000e1eb.bin
29876d08092013f90f498631a0e9d7c22f007ef292a5e1436ccd4f0ed7b9670b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE1EB 9940 bytes

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