Malicious PDF — malware analysis report

Static analysis result for SHA-256 43df54d58d70c27f…

MALICIOUS

PDF

81.0 KB Created: 2021-04-02 09:24:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 61ca4497859e45e3c4e875b24282a2d2 SHA-1: 347b0ff3d651317dd3b14f5610841cb7693774bb SHA-256: 43df54d58d70c27f7597aef6a4ff7808bfb966ec6ed72d7f216b4fe60fe9a37e
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a large number of external links, many pointing to disposable domains, suggesting a link farm designed to redirect users to malicious sites. The document body, though heavily obfuscated, appears to be a lure related to Parisian brasseries.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 6

  • 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
  • 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://jottigo.ru/123?utm_term=reportage+brasseries+parisiennes
    • https://gozezitigaja.weebly.com/uploads/1/3/4/3/134340412/xofaligikovenuke.pdf
    • http://tumibejum.iblogger.org/mowiwom.pdf
    • http://vozupuwoxugug.22web.org/contrato_consorcio_bradesco_automovel.pdf
    • https://fajuvupo.weebly.com/uploads/1/3/5/3/135310445/3268860.pdf
    • https://static.s123-cdn-static.com/uploads/4372963/normal_5fca9292275a5.pdf
    • https://putofikanavo.weebly.com/uploads/1/3/0/7/130738484/mosawa-bofudux.pdf
    • https://static.s123-cdn-static.com/uploads/4377928/normal_5fecc3826c239.pdf
    • https://static.s123-cdn-static.com/uploads/4457861/normal_5fe2ca3215871.pdf
    • http://samejeno.iblogger.org/attaccamento_evitante.pdf
    • https://static.s123-cdn-static.com/uploads/4485689/normal_5fde8fb7e2f4b.pdf
    • https://voruvagozi.weebly.com/uploads/1/3/4/7/134742827/runidiwaxatarofixa.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/baf264c4-41d0-465e-a90a-384e0835be5a/food_dehydrator_jerky_time.pdf
    • https://e3055f73-6236-423b-b810-4bc1a15f300f.filesusr.com/ugd/fa12d1_e4fa7f5ecbaf4e80801587a91df89366.pdf?index=true
    • http://kopedug.epizy.com/rexezuwifebixemolisuko.pdf
    • http://lisotabisalak.epizy.com/jakexatagidusanurito.pdf
    • https://uploads.strikinglycdn.com/files/7f671e8e-a2d5-430f-ba04-3f307ee683f7/glacier_bay_dual_flush_toilet_wont_fill.pdf
    • https://uploads.strikinglycdn.com/files/9969ae58-0ec1-48fd-9bc9-e1abf008d75a/the_norton_anthology_of_world_literature_shorter_fourth_edition_volume_1_ebook.pdf
    • https://uploads.strikinglycdn.com/files/d7bd313d-5c1f-44ce-a062-45786ebc214d/fuduf.pdf
    • https://356bbf58-84af-4bff-99a9-d03346e46411.filesusr.com/ugd/b5472a_792f2b8193d64f04b2bd40f628a8f7c2.pdf?index=true
    • http://gujudos.epizy.com/84894650127.pdf
    • http://laraduvusu.epizy.com/the_coding_manual_for_qualitative_researchers_saldana.pdf
    • https://b5b764bc-4fc6-48d7-9a4b-423a4d05f225.filesusr.com/ugd/3f2390_eaeea3f3323649eb9d47a02860d9cd83.pdf?index=true
    • https://9610c43f-1b2a-4a8a-b660-75aaf3908198.filesusr.com/ugd/286fb8_b59acf0ee8534d7a9f29d2e6a3e2da09.pdf?index=true
    • http://bufolezipozazom.epizy.com/jagujebibomijaxilupuzowe.pdf
    • https://e9542b43-fb79-4c62-94a9-c66526381fce.filesusr.com/ugd/4142f3_682d0fd562ba40469f56f836691e66fb.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_off0000fa60.bin
90cc23fc9f394314a6b66dd22d7dc665a7a5728f42c713e9d3b23c2fc2881e85		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFA60 5104 bytes
font_01_sfnt_off00010bc7.bin
4f0181d53bd51c875255f67082c752458728a72182bb8394a316b5cd3c9dcc3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10BC7 13064 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.