Malicious PDF — malware analysis report

Static analysis result for SHA-256 a19392969ce78dc7…

MALICIOUS

PDF

75.2 KB Created: 2021-03-10 17:40:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 50ca90f30fdc5ecf9cf3618cd7b0dc6a SHA-1: 0aab97fdaf43acbfb2599b82e2f5eacdc8ff15e1 SHA-256: a19392969ce78dc774c2372d7d8630c27a7982d5c30866f94716b5555db725cf
156 Risk Score

Malware Insights

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

This PDF file contains numerous external links, many of which are part of a link farm designed to improve search engine rankings. The primary URL, 'https://xezojetit.ru/wix?keyword=explorer+action+camera+4k+manual', suggests a lure to trick users into visiting a potentially malicious site. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://xezojetit.ru/wix?keyword=explorer+action+camera+4k+manual
    • https://kofivenemiwelew.weebly.com/uploads/1/3/1/3/131380814/c31feb089adf.pdf
    • http://wedipum.mygamesonline.org/how_do_i_get_prior_authorization_for_unitedhealthcare.pdf
    • http://kurixuj.sportsontheweb.net/77952719421.pdf
    • http://gakawisogafuga.mygamesonline.org/how_to_edit_music_on_garageband_iphone.pdf
    • https://tijesefufejeje.weebly.com/uploads/1/3/4/8/134858706/33dc4131f50928.pdf
    • https://motefeka.weebly.com/uploads/1/3/4/1/134108707/e32436.pdf
    • http://jerimujolegem.medianewsonline.com/relatorio_de_auditoria_externa.pdf
    • https://firupafawaxif.weebly.com/uploads/1/3/4/1/134109114/460c7d1dcedf7f4.pdf
    • https://tenivutod.weebly.com/uploads/1/3/1/0/131070705/1689137.pdf
    • http://wiboratiraveguw.mygamesonline.org/anatomy_and_physiology_of_the_human_eye.pdf
    • http://closemaze.com/dabafanividirga1ao.pdf
    • https://gixisisopovi.weebly.com/uploads/1/3/4/7/134713576/zeburo-rupakage.pdf
    • http://store50off.info/sezerawodixaguvebesumodene91b.pdf
    • http://carluxepaint.site/8885617086691kgq.pdf
    • https://soxoxalumowaju.weebly.com/uploads/1/3/4/7/134768556/a2dc99d19c3.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://0778d94d-b67d-49c3-8f6f-43f52d6edec9.filesusr.com/ugd/b85eb0_0d7164cfe71547998d7e363b1150ab51.pdf?index=true
    • https://7f03322d-63d6-449b-a8c2-a80beffeb2b6.filesusr.com/ugd/2994dd_f9d8bce9cbb0485aa864b1a90f192841.pdf?index=true
    • https://c3a7a64c-5591-430b-94d7-c2eadfdf3523.filesusr.com/ugd/966478_6010eebc188e4970937f31fb55ea1ed8.pdf?index=true
    • https://b4140449-9b96-4148-8619-c9b3eed7b48c.filesusr.com/ugd/c33cdb_8a7f6f11726449298bf49b2818b40e07.pdf?index=true
    • https://54570836-76ea-4100-b78f-d1ba4c3cc0d1.filesusr.com/ugd/21ac59_21cff19935ea45bdb33f5fb6aa6cd2e0.pdf?index=true
    • https://4eb3a9b5-ca6a-4b2a-896e-878abc754f3b.filesusr.com/ugd/f1ab86_80fb57fa7feb4b82bf85764ec20ed92b.pdf?index=true
    • https://1c684d3d-b1aa-4d58-8f8e-408f9cf37fac.filesusr.com/ugd/64d889_feb9cec287674a43b4a16e864340cc71.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_off0000eab9.bin
9f4948575d75b615767ebcb502642f2de74108abeaf1657d45ace32d535177ac		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEAB9 5076 bytes
font_01_sfnt_off0000fbf4.bin
8c6299622b85575c9843b6877441dc0659934662a410ed62297548814c2466c4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFBF4 10280 bytes

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