Malicious PDF — malware analysis report

Static analysis result for SHA-256 afccb13c1863d713…

MALICIOUS

PDF

67.3 KB Created: 2021-03-15 21:27:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aadba8f1354f3b350fcbe04700d7e672 SHA-1: 1f951bff31dac7047126579788f07c3d0814d1d6 SHA-256: afccb13c1863d7133c1347af0ce5d7206362ff6ff67c03017b91f6e34dfeb4b8
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a significant number pointing to potentially malicious domains, as indicated by the 'PDF_SEO_LINK_FARM' heuristic. The ClamAV detection and ML classifier also flag this file as malicious, specifically as a phishing trojan. While no scripts were directly extracted, the presence of embedded URLs and the nature of the heuristics suggest an attempt to redirect users to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 5

  • 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
  • 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://maypoin.ru/wix?keyword=ridgeview+raptors+baseball
    • http://top-agent.ru/jomevezuehayo.pdf
    • http://dutov.org/dekutajerozotilekokejomhqlg.pdf
    • http://lightsex.ru/56759663883ng9fd.pdf
    • http://trening-ekaterinodar.ru/ezgo_golf_cart_wiring_diagram_gas3hcg5.pdf
    • http://robinmani.site/fejakuwono1qdqf.pdf
    • http://leomannapov.com/81060195043ffwx5.pdf
    • http://allieshouseofhope.com/83756309570ic4z9.pdf
    • http://migazezi.iblogger.org/texesubunikubofev.pdf
    • http://circleshtang.xyz/wiruroborag8t4h5.pdf
    • http://supsun-aero.com/cascable_android_alternativei3itc.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://b4095e1f-5e43-4c35-8b28-ff0c3185c247.filesusr.com/ugd/9cc3de_b8d3bae09aea497c85c4992e1f362f6d.pdf?index=true
    • https://ee60c613-3dd1-430d-b711-08e3dcbf0273.filesusr.com/ugd/19ce5d_ffac82f3a2f84045a498e5f13dcc7e55.pdf?index=true
    • https://5a2ada08-5b6c-402a-b0df-3636415b461e.filesusr.com/ugd/434ae6_34bda4554620465abde82cbc7c359197.pdf?index=true
    • https://2559d30b-64cd-4b4d-aaad-e76a675dde99.filesusr.com/ugd/f5a024_be1ee02c73ff4d2793fedf7d38f3dba5.pdf?index=true
    • https://2c8134a4-d865-4da1-8961-c755d7242105.filesusr.com/ugd/6dcf04_ae29e7cd6ff04ee8bd532d28d6fe6a4d.pdf?index=true
    • https://d3dd75b0-514a-4dbf-a1f7-973a5b421fb1.filesusr.com/ugd/5b46ec_67c24ccc5c2c4a3dacc3c5b2570751aa.pdf?index=true
    • http://xusezoko.epizy.com/bucoliche_latino.pdf
    • https://s3.amazonaws.com/timeziso/bad_tempered_informal_crossword_clue.pdf
    • https://041bbef9-4dd1-43b9-9ec7-2672afc16ec1.filesusr.com/ugd/686814_f6f178ef090e462dbf52a82999e4266e.pdf?index=true
    • https://s3.amazonaws.com/lunojol/tuvapififal.pdf
    • https://s3.amazonaws.com/sajatofubote/rumosufutalirejejobo.pdf
    • http://xovajiw.rf.gd/fizivinoxiligunerajupavas.pdf
    • https://ff999131-262c-4f46-aa1e-84c50d3d9e43.filesusr.com/ugd/a474dd_e92ea944a53d4022be1c58bf7d2df7ee.pdf?index=true
    • https://f4b9ed98-44c1-44e6-9966-d9817cd43de7.filesusr.com/ugd/9ced5d_5a1222bc33da40c5aa7a31c39556b972.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_off0000c871.bin
89050d5eba1dfab598624060c8ad14787428b9dce282b9f4a26d21126e883054		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC871 5428 bytes
font_01_sfnt_off0000db06.bin
d55afa2000615444eeca808bb9074cd8ba2b924672587b021e4d82742af5b506		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDB06 10440 bytes

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