Malicious PDF — malware analysis report

Static analysis result for SHA-256 7873346f130ea1a7…

MALICIOUS

PDF

88.6 KB Created: 2021-03-14 10:36:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 652ade50083eb1963ef6435d72f4c88d SHA-1: 5183c432d643bf0c28785da0104696fcd358bcb4 SHA-256: 7873346f130ea1a7d723962ed8e9cce9301306c5cbac07f1c6e70f4421fb0a48
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, indicative of a link farm or phishing campaign. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. The embedded URL and the document body's deceptive title suggest an attempt to trick users into visiting a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://gimoguvi.ru/award?keyword=edital+prf+agente+administrativo+2020+pdf+funcab
    • https://wilepojaxuxag.weebly.com/uploads/1/3/4/6/134682450/folato-rewuta-tawuwup.pdf
    • https://gaviwilimoda.weebly.com/uploads/1/3/1/3/131397960/werez.pdf
    • http://ukrdomonis.xyz/55187216286zyfgz.pdf
    • http://minuette.me/kurolomoxaveresuzogibokabywak.pdf
    • http://fortuneocredit.com/15402276423s18k8.pdf
    • https://difomojixi.weebly.com/uploads/1/3/4/3/134319012/6041407.pdf
    • http://bbflowers.net/descargar_el_diario_de_greg_3_pelicula_completa_en_espaol_latinofj9s9.pdf
    • https://wawanuxofidote.weebly.com/uploads/1/3/0/7/130775818/tegove.pdf
    • https://tuxuboninivufos.weebly.com/uploads/1/3/4/4/134478209/tutudemakesedus_guvagiwoxivug_nerupuluzavur.pdf
    • https://wuzakuxiletidu.weebly.com/uploads/1/3/4/3/134322166/05ac43d9d.pdf
    • https://vafopizinenited.weebly.com/uploads/1/3/4/4/134480139/35efceec2f53.pdf
    • https://wixalotoduf.weebly.com/uploads/1/3/5/3/135305273/dudisodezopegu-kebirirupodaxes.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/nakevoja/escala_de_barthel_modificada_portugal.pdf
    • https://45f61934-b4a1-4335-a9e3-e142d9465b5b.filesusr.com/ugd/0dd040_dfdd0db523074f4aa7c05040cc11e018.pdf?index=true
    • https://uploads.strikinglycdn.com/files/9d88cda0-abc8-4d5c-8f86-2a644939c4f7/2010_camaro_ss_wheels_on_s10.pdf
    • https://9f5bcc56-a059-4f00-ae85-604acd6a3d2d.filesusr.com/ugd/ac9354_90ee856de7fa46ba842bd509e0025055.pdf?index=true
    • https://uploads.strikinglycdn.com/files/f17678c9-6bc9-42d7-9255-e8b9cfcc2303/fractured_fairy_tales_list_of_episodes.pdf
    • https://uploads.strikinglycdn.com/files/f2b5e996-191c-479e-91c9-90aa59ce3a93/5536326804.pdf
    • https://s3.amazonaws.com/mukutud/47232100969.pdf
    • https://s3.amazonaws.com/fasudikek/72463028524.pdf
    • https://s3.amazonaws.com/levumoduf/wajeze.pdf
    • https://uploads.strikinglycdn.com/files/b91c35a0-72b3-450e-a98f-952b499a4e64/libro_de_lecturas_1_grado_1993.pdf
    • https://e924225a-aa46-4bfc-8e56-7341551e1833.filesusr.com/ugd/54dfea_4f1190355c5a49cabb0e1ac3e4c7346b.pdf?index=true
    • https://s3.amazonaws.com/nezanurugega/zezatodene.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ff59.bin
87f1ee8661b9917a963b86afc4cc44f4505be8ddda67ae849c65fe00e4aaa65e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFF59 5908 bytes
font_01_sfnt_off00011369.bin
17b6461647c4c96e413bb8943f7fe19633934312f7ae8f883ec8c98334622003		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11369 13944 bytes
font_02_sfnt_off00013d72.bin
764fe263e68fd20aff2bbd96e69f5a400d440299d02096befa162391f913c7cf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13D72 16144 bytes

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