Malicious PDF — malware analysis report

Static analysis result for SHA-256 fad05155dbba2091…

MALICIOUS

PDF

76.3 KB Created: 2021-05-11 21:16:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0b37368343692e7135e32e87fefd985f SHA-1: 9c8f6ab204c6928b1232d33506ce143e362c9e76 SHA-256: fad05155dbba20915bfb2fb695b24b2fa449a2476c1603b023413255f982c502
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to other PDFs, indicating a link farm designed to manipulate search engine results. One prominent URL, 'https://resalured.ru/strik?utm_term=summer+waves+pool+vacuum+hose', is likely part of this scheme to direct users to malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://resalured.ru/strik?utm_term=summer+waves+pool+vacuum+hose
    • http://profer-opt.ru/ga_1000_4a_strapshhei.pdf
    • https://dubibezu.weebly.com/uploads/1/3/1/4/131453247/kiruz_wovagubofoxeb_maxikowavuropom.pdf
    • http://pornbustyvids.com/594600295760l8eb.pdf
    • https://gatevipamor.weebly.com/uploads/1/3/4/8/134878843/sazotamow.pdf
    • https://sizeduxaginota.weebly.com/uploads/1/3/2/7/132712537/9575255.pdf
    • https://xukujeferok.weebly.com/uploads/1/3/4/4/134435440/pibuxofebopokov.pdf
    • http://vzruvayarttraff.xyz/ponafimojojokulibaxiredef92j1.pdf
    • https://lulitetuxopibol.weebly.com/uploads/1/3/1/1/131164377/jazajazalenew-gireguruvikuzut-vatun-towovininegez.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/nevovumowa/xidasefajirotewuwotak.pdf
    • https://ee897e78-a157-4eb5-8a47-d615096087a2.filesusr.com/ugd/113e89_0d3698661bdd499b9b9dee947d25499d.pdf?index=true
    • https://dc6b22d1-fd3c-476a-b8f1-b0505981f591.filesusr.com/ugd/ab5adf_81136e68c268441f80aec0424232e166.pdf?index=true
    • https://s3.amazonaws.com/pazatuv/free_cartoon_network_games_android.pdf
    • https://s3.amazonaws.com/bulalowisu/wexijuragow.pdf
    • https://d38713d8-f9e0-49bf-8e72-3f46774ce551.filesusr.com/ugd/b3faf5_93848193e1ac470da0f161677d8dda93.pdf?index=true
    • https://33b7cf8b-1cb2-46d9-9063-17e97cba5e80.filesusr.com/ugd/9edd50_e3b3defcf4fb4bdf8836d9b39004ee77.pdf?index=true
    • https://36622f5a-5a1b-41a5-aa98-965156e47ac2.filesusr.com/ugd/804ff6_015eb6771aad4efcb7a1f91d726009ec.pdf?index=true
    • https://s3.amazonaws.com/wusone/5146608219.pdf
    • https://s3.amazonaws.com/zamuriza/how_to_use_the_my_k-cup_universal_reusable_coffee_filter.pdf
    • https://s3.amazonaws.com/falejogajir/functionalist_perspective_on_deviance.pdf
    • https://66f9c2bc-82a6-463d-9ccd-9c94d3d8805e.filesusr.com/ugd/b361c6_ef4c33688c7d47c887efee80aa3a1c38.pdf?index=true
    • https://s3.amazonaws.com/zumezeviwakiz/razesisijovijotirutozafez.pdf
    • https://fa5d8e44-005d-4c05-925d-ba60cb7f5023.filesusr.com/ugd/121e37_e8bcfbf6937b4946b882b0c44a52a0b0.pdf?index=true
    • https://s3.amazonaws.com/tojazudibumogab/50960359619.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_off0000eabb.bin
2070100ec4d3afa3195a98eee07b49ec3294734b39d7a311c30fa46c463f5f6a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEABB 5428 bytes
font_01_sfnt_off0000fd15.bin
086afbe731602e197927ab2c99226d661be8501cc35647d4c79fe03d4bd81eef		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFD15 11476 bytes

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