Malicious PDF — malware analysis report

Static analysis result for SHA-256 460be60646d59cd4…

MALICIOUS

PDF

79.7 KB Created: 2021-03-08 19:41:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: b06a7aead6b0befabe73aebda1489a3d SHA-1: 46553201a6f58f6005fd4d07a3a340873c9690bb SHA-256: 460be60646d59cd493de3e179476a551247ac8739730fca36c8731f6656f277c
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous external links, many pointing to disposable domains, suggesting a link farm or SEO poisoning tactic. The embedded URL 'https://mezovuduw.ru/award?keyword=equidad+economica+pdf' indicates a lure to a potentially malicious site. ClamAV and ML classifiers also flagged this PDF as malicious, likely due to its structure and embedded content designed to redirect users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://mezovuduw.ru/award?keyword=equidad+economica+pdf PDF link annotation
    • http://thelandofbadideas.com/88746087527pkrv5.pdfIn PDF document text
    • http://ketrovk.xyz/47178502652w9nin.pdfIn PDF document text
    • http://nipokaxa.getenjoyment.net/bofumikewowewe.pdfIn PDF document text
    • http://budivev.scienceontheweb.net/how_to_read_a_lowrance_hook_5_fishfinder.pdfIn PDF document text
    • http://rasipafus.getenjoyment.net/how_to_change_a_3d_polyline_to_2d.pdfIn PDF document text
    • http://trychambre.xyz/vertical_and_horizontal_communication7hm79.pdfIn PDF document text
    • http://businessoutsourcing.org/relatakejobugegebatagifvfpm0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/lemefofutomapox/64488644955.pdfIn PDF document text
    • https://40fd9d30-e691-4ad4-9ff9-7de67b304886.filesusr.com/ugd/45b27a_fea306dee33142818737b4283ce5158c.pdf?index=trueIn PDF document text
    • https://920f4c01-5fd6-4c40-8b27-b99972fecb60.filesusr.com/ugd/d63aaf_a775b522c9454c19a89f7093ef51a8e1.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pogolo/67587847448.pdfIn PDF document text
    • https://a12a05ab-6462-4855-b086-b0a2a961d6d8.filesusr.com/ugd/2c76f4_e750841dfbe04f51995788b08bc92c1a.pdf?index=trueIn PDF document text
    • https://1618b3f4-dcc0-4047-a816-eeb1cbe43c51.filesusr.com/ugd/a01749_966487835d884fce9128d7b9ba2867b0.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kiwopusafize/auditor_report_2018.pdfIn PDF document text
    • https://d525ee04-2a40-494f-8ba9-fee52f7b18ee.filesusr.com/ugd/8b8e24_6fe53c2062684d559fb4c27b6d6b83e5.pdf?index=trueIn PDF document text
    • http://vasakuzepilaxi.onlinewebshop.net/how_long_does_it_take_to_write_a_movie.pdfIn PDF document text
    • https://0d555108-1732-4721-8d72-76d747b2053a.filesusr.com/ugd/1b0481_78864bb651404257abf4d120cc60d843.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/954ccd0b-22c5-447d-b28b-920347047915/mcp61pm-hm_drivers_xp.pdfIn PDF document text
    • https://d6236f05-450e-4b96-9875-1783d83c708b.filesusr.com/ugd/912de2_0f06e5df4877469592b337cc2be2ca08.pdf?index=trueIn PDF document text
    • http://gixarewujedel.atwebpages.com/89816725488.pdfIn PDF document text
    • https://fd0ef26f-7b8f-4c91-b3b2-19f7ec93487a.filesusr.com/ugd/4174bf_77ebbe5ee6fa4e5fbe2a05efcaa68cdb.pdf?index=trueIn PDF document text
    • https://7ae52be2-ba3c-41fb-8935-29281088223e.filesusr.com/ugd/affaa6_5a9fd4122bf846cbb07e7a55842df735.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/f3a39492-e7a9-40c3-986c-51495a118d76/ralirefu.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_off0000ec77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC77 4880 bytes
SHA-256: e7177b848016160ac45a103e1766283b3e2d9747b765785e4a60e53c23b666f7
font_01_sfnt_off0000fcf3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCF3 11340 bytes
SHA-256: b4d6eda86cf42861bcc61119ddadc679bf4e37730e27c92afc924d3bf8016268
font_02_sfnt_off000121ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121CA 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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