Malicious PDF — malware analysis report

Static analysis result for SHA-256 2301962b26a704c3…

MALICIOUS

PDF

79.4 KB Created: 2021-03-26 13:00:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9d3dbadbb128d4ca632f44d19fd0e5b7 SHA-1: 77117173b205f9495e4b4c6754ebff80572e332f SHA-256: 2301962b26a704c3ab2987bf608bb1c81252eacbba1a6af23b7b01df04e29b6c
156 Risk Score

Malware Insights

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

The PDF document contains numerous external links, flagged as a 'PDF_SEO_LINK_FARM', suggesting a phishing or malware distribution attempt. The embedded URLs, such as 'https://soxebez.ru/123?utm_term=bombay+velvet+theme+song', are likely used to redirect users to malicious sites. ClamAV detection and ML classification strongly indicate malicious intent.

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://soxebez.ru/123?utm_term=bombay+velvet+theme+song
    • http://freefire-gifts.com/chapter_4_atomic_structure_wordwise_worksheet_answersfqhca.pdf
    • https://nezasitize.weebly.com/uploads/1/3/5/3/135303973/03369.pdf
    • http://krokoboko3.xyz/where_to_buy_house_of_night_series5jlmd.pdf
    • http://pitushok.space/70963080287ynrdo.pdf
    • https://zegotasubevit.weebly.com/uploads/1/3/6/0/136097081/vesofo.pdf
    • http://nosinoski.shop/sofewumezagadelipijugs08g.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://4adff18d-dc39-4349-be2c-eeb12737f1cb.filesusr.com/ugd/9117e0_0fab532272494555816118b0c06f93b5.pdf?index=true
    • http://purevaxa.epizy.com/cracking_the_sat_with_5_practice_tests_2020_edition.pdf
    • https://2efabd41-1f95-43d0-8245-5f8eb9267247.filesusr.com/ugd/2f4ddf_9a5b5729c548454b81fc16bd36c8e3fd.pdf?index=true
    • http://pokazirajig.rf.gd/behavioral_interview_example_answers.pdf
    • http://xedupuxatox.rf.gd/p_o_britannia_deck_plan.pdf
    • https://uploads.strikinglycdn.com/files/b857190f-f39e-4f01-b578-208bd4ea858f/where_is_midnight_in_the_garden_of_good_and_evil.pdf
    • https://2489a575-72f7-492f-b117-28cfe4a4d2a3.filesusr.com/ugd/d81705_5afbd0beaeef485aa8e6262b89a105cd.pdf?index=true
    • https://76ed6b59-b034-43ac-b949-e1c08f76e3cb.filesusr.com/ugd/ee6100_7a2f7ec2739d497db4c1e3356c894237.pdf?index=true
    • https://ab737b70-891a-4a1f-8db9-ee548211cb31.filesusr.com/ugd/ce14f3_1c93ef378a2d43b0bfd84b0bcbd42c2f.pdf?index=true
    • https://uploads.strikinglycdn.com/files/04d71d83-cec4-458c-92fb-ac9962e2e355/is_there_going_to_be_a_mysterious_benedict_society_movie.pdf
    • https://e0220c8c-c322-4c33-af83-7c5b0fe00b66.filesusr.com/ugd/a771bd_b1adc41e55a24f40bcfa00facd1aab04.pdf?index=true
    • https://aee666f7-65d2-4416-8089-42e5bd85255d.filesusr.com/ugd/c4036c_cd461dbb590c4958ac04b5b51a99ccad.pdf?index=true
    • https://df9240ce-57b4-430e-a582-521170ca5232.filesusr.com/ugd/10b03a_32ff771805ca4ac583dc8af996d0f325.pdf?index=true
    • https://7fc1e5b2-1dd8-4457-9de2-3dea1ab9f589.filesusr.com/ugd/fedd61_c53c9e40e2ee478b989e0dffcea79fd0.pdf?index=true
    • 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_off0000f6f8.bin
b2fd48b68a98a007abb5f991f74fd7c07a6f2e063d6955007d3d9a4b65bafc1c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF6F8 5352 bytes
font_01_sfnt_off00010916.bin
e15fe1f7511b24ae1b45a3c58c17dda89beee197b11e67c79de0963aabab0f1e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10916 11620 bytes

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