Malicious PDF — malware analysis report

Static analysis result for SHA-256 297b49bd1a0235d8…

MALICIOUS

PDF

77.0 KB Created: 2021-03-21 05:43:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6e32b76fb51b668a5555418ffd1c59e0 SHA-1: e6862a5d1802246c0eb488a342a292c91f54e67c SHA-256: 297b49bd1a0235d8c4bde10dccaaa5635f641c17dabc371a4eec5c488dfb1150
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a primary URL pointing to a site offering game cheats, suggesting a lure for phishing or malware. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a malicious document designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://maypoin.ru/wix?keyword=world+war+heroes+ww2+cheats
    • http://chebsvet.ru/8699438892885hx9.pdf
    • http://elerctum.org/where_to_stream_the_smartest_guys_in_the_room3aqn2.pdf
    • http://nubolats.xyz/zodinafumoxazofewodevedov3c5sa.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/pasutiz/89610473211.pdf
    • https://s3.amazonaws.com/patilawasu/learn_python_the_hard_way_review_reddit.pdf
    • https://s3.amazonaws.com/rerinago/working_of_bushing_in_transformer.pdf
    • https://uploads.strikinglycdn.com/files/0dfcb256-c846-4f7d-9951-2842b0dbe6f7/xunosavegaxobozipunara.pdf
    • https://uploads.strikinglycdn.com/files/776f8b28-fa06-4369-b8ad-b2e0bed5d9d7/sevumep.pdf
    • https://s3.amazonaws.com/ruzumeb/aoe_2_mac.pdf
    • https://s3.amazonaws.com/kegubinefuda/character_reference_for_housing_application_template.pdf
    • https://uploads.strikinglycdn.com/files/a54f03a9-4502-4e2c-a9d6-7b7464beacb2/throne_of_glass_quotes.pdf
    • https://d7d9470a-9784-4c28-ac68-b1ab0f70ddf3.filesusr.com/ugd/148484_e5196b8adec548e18f919f1b87ba864e.pdf?index=true
    • https://uploads.strikinglycdn.com/files/902db7ef-2709-414f-930f-fd491dff116c/stephen_king_horror_movies_2020.pdf
    • https://d62ff7d9-aefc-4ab8-8cdf-af38868aea16.filesusr.com/ugd/54b9a1_e8835584e6e84befa8b846f79c51b63e.pdf?index=true
    • https://d102a0f2-001f-4998-bb0a-88ac30ac05b5.filesusr.com/ugd/771ea4_cfc5c052e44244b7b44130baae815b57.pdf?index=true
    • https://uploads.strikinglycdn.com/files/7823d622-6eb9-4b71-aca6-6ba908de36ae/how_to_interpret_international_law_developed.pdf
    • https://uploads.strikinglycdn.com/files/a707493f-118f-4a71-a487-6625a56c28df/76619701301.pdf
    • https://s3.amazonaws.com/metubevozisul/music_appreciation_syllabus_high_school.pdf
    • https://s3.amazonaws.com/vipinib/zexodunakitamanebox.pdf
    • https://uploads.strikinglycdn.com/files/14ea2cd2-3686-4f98-ac4c-21a7a13149cb/61220504248.pdf
    • https://uploads.strikinglycdn.com/files/c654dd3e-4ca4-4ef6-b404-69c97797d0d3/votanuzi.pdf
    • https://s3.amazonaws.com/jalasilunaz/acylium_ion_formation_mechanism.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_off0000f0bc.bin
1ef24999ca364646dce30d7dddc16a54c694dc465ebae3e92e69c9a13b4b5ec5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF0BC 5264 bytes
font_01_sfnt_off000102b3.bin
25e1d0618441908f42c601e64733ebb6ad74932f6042e95a1c44ddd8b918345d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x102B3 10652 bytes

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