Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b980ec0733c4992…

MALICIOUS

PDF

67.2 KB Created: 2021-09-17 17:43:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 993e0aa87925de35303392d9a88480a0 SHA-1: b8dc27e080ed5d182b2ba76e78aa8110c86b0a8e SHA-256: 7b980ec0733c499286d829a2a3f1766e8e090385ac32bacb8b3c50349a4acf04
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains an image-based lure, a common tactic for phishing or malware distribution. It includes numerous external URLs, one of which is specifically crafted with 'download botim for android' in the UTM parameters, suggesting a malicious download attempt. The ClamAV detection and ML classifier strongly indicate malicious intent, likely involving the execution of JavaScript to facilitate further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 67 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://huntic.ru/uplcv?utm_term=download+botim+for+android PDF link annotation
    • http://fabriziocar.it/userfiles/files/sesowabamotetefevonuvej.pdfIn PDF document text
    • http://tumwebthailand.com/ckfinder/userfiles/files/zixanukanakan.pdfIn PDF document text
    • http://jingyilin.org/uploads/file/vumamegagavotanujagulek.pdfIn PDF document text
    • http://anais.terminarz.online/kosmetyczka/krakow/files/sinalizagok.pdfIn PDF document text
    • http://happy-playground.gr/uploads/_uploads/files/zanidupitizodovozoreten.pdfIn PDF document text
    • https://pacientes.quiroser.com/UserFilesQUI/file/xefiw.pdfIn PDF document text
    • https://capitalsyndic.com/userfiles/file/sajadi.pdfIn PDF document text
    • https://funbugs.ie/userfiles/file/94752005493.pdfIn PDF document text
    • http://chocolatycakes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b196bc3e5b---3946580744.pdfIn PDF document text
    • http://lgassociates.in/uploads/tujijukilugulinegikasof.pdfIn PDF document text
    • https://skvely-kup.cz/files/file/4268454266.pdfIn PDF document text
    • http://amexeuro.com/an3_Uploads/file/74066824115.pdfIn PDF document text
    • https://siahotel.com/userfiles/files/maniziwuj.pdfIn PDF document text
    • http://gustosandvic.com/ckfinder/userfiles/files/sedotixebaden.pdfIn PDF document text
    • http://drivingschool-brno.eu/files/fojunugiwaluvulugokiw.pdfIn PDF document text
    • http://urs-certification.com/gais/image/file/97810891746.pdfIn PDF document text
    • http://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/1612fc3f87b423---metawaxovo.pdfIn PDF document text
    • https://mimpishio2.com/contents/files/gajobasi.pdfIn PDF document text
    • https://readandenjoy.ae/userfiles/files/98602400128.pdfIn PDF document text
    • http://vasekurzy.cz/userfiles/file/rujobemivabajuxegajefigo.pdfIn PDF document text
    • http://dentalweek.eu/userfiles/files/72662125827.pdfIn PDF document text
    • https://www.pirkitpadangas.lt/ckfinder/userfiles/files/liluvufunikarewasujewa.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ad19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAD19 10440 bytes
SHA-256: 16a785a244e24ef6920e35b9dfbc767a5bdd556161fcd2fac01c33fe710406e2
font_01_sfnt_off0000c4bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4BB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000dccd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCCD 14024 bytes
SHA-256: 749d0c936d9cf42c24e429407bbf8db7cd7c1ecdee6d23a24f510abbda9ca127

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