Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0a3cc2195d1042f…

MALICIOUS

PDF

74.5 KB Created: 2021-03-31 06:12:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 52c2125a5bdf25c4bc0305ea67e029ae SHA-1: 0e4930c1473016f8e3c630bab0858dc9d4c8157b SHA-256: c0a3cc2195d1042f6bab953a7a5639ad5d39b69be947a22db1c183ec2c4cb18c
186 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains a link farm with numerous external URLs, including a suspicious one pointing to soxebez.ru. The document body, though heavily obfuscated, appears to contain keywords related to fishing, suggesting a lure to phishing or malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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/strik?utm_term=bottom+fishing+rigs+for+bass PDF link annotation
    • http://mujabelor.mywebcommunity.org/functionalist_theory_of_mass_media.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446264/normal_60445decc6721.pdfIn PDF document text
    • http://rigoditibalun.mywebcommunity.org/dubuvavogekexiwef.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485828/normal_5ff00a497232c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://8d2868a3-57b7-484c-81f6-493c1c4f5daa.filesusr.com/ugd/a8ca0f_e0707a30730e4381a3cd24f5e15622e7.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/47317e30-b398-474f-8ee5-9a8abeb96db6/maximum_ride_the_movie_2.pdfIn PDF document text
    • https://5634f520-c25d-421d-ab67-3d94505d13cb.filesusr.com/ugd/1b85ab_bdca0b286a694895a6e17116bcd0293f.pdf?index=trueIn PDF document text
    • https://3d7304b5-8527-495f-b913-615d6f357a43.filesusr.com/ugd/ef7486_12a96bb29d32420c873e96ae4f2ad661.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/4088309a-64f4-44fd-b472-1e0b3e3ecff7/what_is_the_best_app_for_drawing_on_pc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb13abe0-d18b-450d-ae30-84e48b8112b8/how_to_assemble_total_gym_fit_max.pdfIn PDF document text
    • https://645c32c3-7e99-4959-b93b-7980205539d7.filesusr.com/ugd/30a31c_9c031279b8184261b564a0f25f24f2ea.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ba29e82-c14d-4881-85c3-3cdb5e7f7b77/how_to_field_strip_a_taurus_pt92.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3574e63-c086-441a-b401-8445cd3d090f/93732776578.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/660607c3-dca8-4264-bd49-2475ad8cc5ae/cuanto_son_200_gramos_de_mantequilla_en_tazas.pdfIn PDF document text
    • https://a1c9bafd-2917-4c1b-b79c-a4b44a941470.filesusr.com/ugd/f0f215_46e46456a8c74c1fa3a574f1a897a675.pdf?index=trueIn PDF document text
    • https://47e4df30-8702-49a4-8bd5-327e1546ff06.filesusr.com/ugd/379272_ae2f308d9ed8448f92cadd771ab8d861.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/18ca6c45-c0ba-45c7-8a91-efe9b604ebdc/i_cant_turn_on_my_panasonic_tv.pdfIn PDF document text
    • https://77bac38d-831a-46d6-8f22-d7743fcadc58.filesusr.com/ugd/5b9a87_ae15c96eedd445158fe8f908cd5d5a13.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/54b7dba9-9f09-4d88-ada4-c0f467010ac3/list_of_html_tags_and_definitions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a3c3707e-372b-4d0c-87db-68983daf2761/golds_gym_xrs_20_olympic_workout_bench_with_squat_rack_dimensions.pdfIn PDF document text
    • https://eee5dff6-7331-416e-acdf-593d0c386862.filesusr.com/ugd/21e9e0_86ddecc2b28046d6b23c59ea2a8842ae.pdf?index=trueIn PDF document text
    • https://1628ddcf-e301-416d-9649-d9339b85441b.filesusr.com/ugd/0b1079_0c578d1220a24fcb8397c6aa2512a24d.pdf?index=trueIn 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_off0000e775.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE775 5340 bytes
SHA-256: b2e24bc4c50c8e1b1adbfbd9d285ab4cfbc64bfa47b8ada6b73226de21533d0e
font_01_sfnt_off0000f97d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF97D 10372 bytes
SHA-256: 4437d00b6869aed0a8296263d6759e40589c6bce3d5a79de2604465081605002