Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f9230f12952f476…

MALICIOUS

PDF

79.7 KB Created: 2021-03-16 04:53:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8be8792efb974d6d9ca6b34889d23721 SHA-1: 3d0b8d8c72187a36549f4fd03b57fbc740390c67 SHA-256: 3f9230f12952f4768c8a6631678f51aa7fd92cafad6ba8bc3df069169f29cb2f
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, identified as a link farm, with the primary URL being 'https://ponafet.ru/wix?keyword=no+man%2527s+sky+exotic+ship+catalogue'. This suggests a phishing or malware distribution attempt, leveraging a seemingly innocuous document title to direct users to potentially malicious sites. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://ponafet.ru/wix?keyword=no+man%2527s+sky+exotic+ship+catalogue
    • https://cdn-cms.f-static.net/uploads/4374013/normal_602d717c0c7fa.pdf
    • https://zudovizu.weebly.com/uploads/1/3/4/3/134338339/e2e4d174e.pdf
    • http://digtalcaliper09.xyz/apple_tv_3rd_generation_apps_australiaaf1er.pdf
    • https://static.s123-cdn-static.com/uploads/4469617/normal_60009181e73ef.pdf
    • http://foyou.store/how_to_pass_mcsa_server_2016cd7tx.pdf
    • https://jufavufopu.weebly.com/uploads/1/3/4/3/134340263/6cf5b31a.pdf
    • http://nexofozupugasi.mywebcommunity.org/56862825179.pdf
    • http://doordash.link/soburuob37h.pdf
    • https://rigukolanerimi.weebly.com/uploads/1/3/4/5/134519373/mewulizenagolagataf.pdf
    • http://medway24.com/who_makes_the_best_microwave_convection_oven41buw.pdf
    • https://xumizobizuzu.weebly.com/uploads/1/3/4/6/134688834/1863758.pdf
    • http://zdsshop.top/how_to_calculate_instantaneous_power_in_ac_circuitwcqou.pdf
    • http://xoxapepagaxon.mypressonline.com/tratamiento_de_blastocystis_hominis.pdf
    • https://static.s123-cdn-static.com/uploads/4447487/normal_5fc75752d9104.pdf
    • http://mantenancie.com/270704870664ovne.pdf
    • http://sehq.xyz/philosophy_books_for_beginners_quora8bdaw.pdf
    • https://cdn-cms.f-static.net/uploads/4454277/normal_602d47d428dc5.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://ebbb41b5-b8b7-4bfc-9e1b-23e79ad93844.filesusr.com/ugd/5eba67_86ca4c5a2f1742a888e56103951a91ed.pdf?index=true
    • https://12a3aa02-022d-4218-8efb-90aa4388683d.filesusr.com/ugd/6dfd9b_79c4f7a135d04aaba337fa44d4fb7262.pdf?index=true
    • https://8bd0dbf5-62e0-4684-a95a-1d9666dfa34a.filesusr.com/ugd/e71694_20d7aa239a104c9ab3f2b5590472e4ec.pdf?index=true
    • http://vorisenunajix.myartsonline.com/lurakakafosav.pdf
    • https://1682489e-d94b-4f22-b6a6-c8ecb623ca2e.filesusr.com/ugd/5f226e_c0dcd0016d6d497897d06f17f1c1de9e.pdf?index=true
    • http://malejubu.myartsonline.com/house_rules_for_roommates.pdf
    • http://pabewuvuxaf.onlinewebshop.net/tabla_de_conversion_de_centimetros_a_pies_y_pulgadas.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_off0000f9f5.bin
1c97e76867820eebedfb9360bbe96f5835a9f8a998543e51431367266249a123		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF9F5 5488 bytes
font_01_sfnt_off00010c9d.bin
f6fdc5189fe5e2541b53e848fd308f56fc57c73ffb6eb90ffced51c95a5d81ca		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10C9D 10624 bytes

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