Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f7a0c7ad1ecbe8a…

MALICIOUS

PDF

68.5 KB Created: 2021-10-01 01:11:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: 69da55927b4426d2a1c34c9878f9cc9d SHA-1: e58753025295e4dcc60b5f39b29f7fa443ad9346 SHA-256: 7f7a0c7ad1ecbe8a8003ad86daa9118ce2d4a8932682c27486906eabaa9307ae
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF is identified as an image-only lure, typical for phishing or malware distribution, as indicated by the 'PDF_IMAGE_LURE' heuristic. It contains numerous embedded URLs, many of which are hosted on disposable domains, suggesting a link farm designed to obscure the ultimate destination. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to a malicious site or download a payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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 68 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://wastran.ru/uplcv?utm_term=simulator+indonesia+mod PDF link annotation
    • https://abriganature.centralcms.cloud/galeria/files/16441320757.pdfIn PDF document text
    • http://euroteam.vn/ckfinder/userfiles/files/80396440202.pdfIn PDF document text
    • https://marblo.ph/app/webroot/img/files/zutofafop.pdfIn PDF document text
    • http://cokhilegia.com/upload/files/45840840249.pdfIn PDF document text
    • https://onderhoudnlgarantie.nl/upload/file/tibuminawuvitakenuzive.pdfIn PDF document text
    • http://dlugopis.kbo.pl/ckfinder/userfiles/files/25600077831.pdfIn PDF document text
    • http://pskov.agisinfo.ru/uploads/content/files/82852199495.pdfIn PDF document text
    • http://hitplus.eu/userfiles/file/ratopilos.pdfIn PDF document text
    • http://thailaundry.com/imgUpload/files/66502725072.pdfIn PDF document text
    • https://fidelishospice.com/ckfinder/userfiles/files/fenejugo.pdfIn PDF document text
    • http://placc.info/up_image/92940742232.pdfIn PDF document text
    • http://thesnowmanicecream.com/ckfinder/userfiles/files/44798968230.pdfIn PDF document text
    • http://gonzagafood.com/userfiles/files/81946984389.pdfIn PDF document text
    • http://furkansigorta.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16147604f59c94---66909915470.pdfIn PDF document text
    • http://alpes-maritimes.proximeo.com/ckfinder/userfiles/files/31595782067.pdfIn PDF document text
    • http://viprealestatebrokers.com/userfiles/files/fawanirubazuduluzate.pdfIn PDF document text
    • https://olajpark.hu/files/files/leniboveraxos.pdfIn PDF document text
    • https://drlalashow.com/php/billboard/uploads/file/49284627562.pdfIn PDF document text
    • https://atavio.ru/files/file/sinasutelulikorolizozino.pdfIn PDF document text
    • http://skkouty.cz/ckfinder/userfiles/files/zozatosar.pdfIn PDF document text
    • http://harmonie-avion.fr/actualite/files/49348314837.pdfIn PDF document text
    • http://rovitek.com/userfiles/file/73887584284.pdfIn PDF document text
    • https://formapolis.it/wp-content/plugins/super-forms/uploads/php/files/b18389c5bc52cb7bd2988d1a0b32d30b/tisalekododexotakadafurib.pdfIn PDF document text
    • http://tramtronbetong.com/uploads/userfiles/file/saxetekorunamezofos.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_off0000b0f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB0F7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c90e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC90E 10584 bytes
SHA-256: 1bb6129a71c765ea1e8bfb7379c8cb6021ef74158e44d87ddd513e953617b2d1
font_02_sfnt_off0000e122.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE122 14188 bytes
SHA-256: 78c3ee72079a19001524bedd3637f7c42e9a57bd9f6f6fa8ba4879d6285c084b