Malicious PDF — malware analysis report

Static analysis result for SHA-256 80cda70cd6af6830…

MALICIOUS

PDF

82.0 KB Created: 2021-03-14 14:17:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 257ec1762bdd4991495e5441c6ad7fc0 SHA-1: 9c989102aa4b32ad04e7afc9de968eee7f36acc7 SHA-256: 80cda70cd6af6830acbf806342b2f3fc0910a88830d07eff0ba19ef19109df6f
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains numerous embedded URLs, with a primary focus on redirecting users to external sites like 'xajibur.ru' under the guise of providing information. The document body, though heavily obfuscated, appears to be a lure related to search terms, aiming to trick users into clicking malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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 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://xajibur.ru/award?keyword=world+war+2+in+philippines+pdf PDF link annotation
    • http://raisinshub.club/android_tablet_pc_replacement080zi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469106/normal_601ddeb30f0be.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413227/normal_5fd6aedd77389.pdfIn PDF document text
    • http://zovizakuxefo.iblogger.org/langrisser_mobile_ice_dragon_guide.pdfIn PDF document text
    • http://fasadi.site/genie_model_7055_red_light_blinkingij1kb.pdfIn PDF document text
    • http://stonersfranchise.com/the_silver_way_free_downloadmgyeo.pdfIn PDF document text
    • https://cdn.sqhk.co/kinanekoxo/Eijsibe/samsung_smart_tv_guide_wrong_time.pdfIn PDF document text
    • https://cdn.sqhk.co/xovujiroveg/1jjvjfw/fatet.pdfIn PDF document text
    • http://hotsales-com.xyz/myron_mixon_basic_bbq_rub3n7w3.pdfIn PDF document text
    • http://setefigidoral.iblogger.org/dabex.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://c2093f15-f4fb-4bda-9582-db5404103fa6.filesusr.com/ugd/b28561_bba29eac7031422cbc504b52ce1766d6.pdf?index=trueIn PDF document text
    • http://juxudawalugevop.epizy.com/chakram_malayalam_movie_songs_free.pdfIn PDF document text
    • https://76ed6b59-b034-43ac-b949-e1c08f76e3cb.filesusr.com/ugd/ee6100_121d73a1c1d44671be1348ba9e6c1199.pdf?index=trueIn PDF document text
    • https://c36efdde-2309-4ce2-a10d-b6df2ce12cd8.filesusr.com/ugd/e98059_e1b397543dc5449a8ce57c376b3d7c9f.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_off00010162.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10162 5368 bytes
SHA-256: a7ace2e41c7fef29c5eb38ce3fdda4bec6d372d0e5c616bab6dc1556e13f555a
font_01_sfnt_off000113b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113B2 11380 bytes
SHA-256: afdc99982e0c484a6227b11dca014ff3d46e1f212de8ff46316d2fd59c756c6a

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