Malicious PDF — malware analysis report

Static analysis result for SHA-256 46db3ee4cdd133da…

MALICIOUS

PDF

81.4 KB Created: 2021-03-14 21:40:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: a70b9a09bab224273eca9bc9dba15e6e SHA-1: 394f68202649721f01057b0e68069bf66cacc6fe SHA-256: 46db3ee4cdd133da6b3efab19b84b003efa8e7e552b8207a14653714de51eca3
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are SEO-themed and point to other PDFs, suggesting a link farm or redirection mechanism. The primary URL, vilenefex.ru, is associated with a keyword search, indicating a potential phishing or malware distribution lure. ClamAV and ML classifiers also flagged this PDF as malicious, specifically as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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.
  • 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://vilenefex.ru/wix?keyword=the+book+of+satoshi+free+pdf PDF link annotation
    • http://setopin.mypressonline.com/what_are_three_examples_of_in-memory_databases.pdfIn PDF document text
    • http://koparikamoze.scienceontheweb.net/busedepebaresikana.pdfIn PDF document text
    • http://junumidutuzakox.getenjoyment.net/jadudo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487902/normal_5ff1962eb43ed.pdfIn PDF document text
    • http://wivaserana.mywebcommunity.org/how_to_clean_bissell_proheat_2x_revolution_brushes.pdfIn PDF document text
    • https://xuzonikafu.weebly.com/uploads/1/3/5/3/135351414/nilirake_xukopa_kafivafapipad.pdfIn PDF document text
    • http://jepewadagamer.scienceontheweb.net/americas_book_of_secrets_season_2_episode_12.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467975/normal_601968e2b2b33.pdfIn PDF document text
    • https://riwaxetonebena.weebly.com/uploads/1/3/4/3/134363930/bazajixilalunebi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/caf9689b-0bd5-4732-9c72-ebd30ba90023/metroid_2_return_of_samus_final_boss.pdfIn PDF document text
    • https://s3.amazonaws.com/xarojapi/avg_internet_security_offline_update_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a88b0d98-2b90-42e9-b8a9-5bbe04bbd05a/dawojelon.pdfIn PDF document text
    • https://s3.amazonaws.com/banula/58099553924.pdfIn PDF document text
    • https://s3.amazonaws.com/tomamujuf/90193824432.pdfIn PDF document text
    • https://s3.amazonaws.com/lekezaru/lefunixoponorelanalo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c6333aef-27bb-4260-b38c-d38de7baaf25/air_standard_assumptions_brayton_cycle.pdfIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f1cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1CF 5248 bytes
SHA-256: 9c53771a6920ec84bb54c6550d3d90ceb3f742f19d6dcd3857db267d51b11e14
font_01_sfnt_off00010393.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10393 4848 bytes
SHA-256: 47cb6e6abc7099ff90a863a2f7adaa0f0a36cf2200468900577468b6c4f4e242
font_02_sfnt_off0001111d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1111D 11100 bytes
SHA-256: f0cc024cfdce2439a489826fba0feb8ddd5d791349fa51c0225e6e9494cd0287

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