Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e3dadf8eb9ae0e4…

MALICIOUS

PDF

68.5 KB Created: 2021-09-26 18:15:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 00177b4fe968ae2065a28f4cffdd5166 SHA-1: 1b104976dbbeb0451f4156e52040f18e9a38cb5f SHA-256: 2e3dadf8eb9ae0e4633e3a6d1d89f40c70381f74d115d2a32be120e322c1ef44
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and multiple external URIs, indicating an attempt to redirect the user to malicious content. The heuristic 'PDF_IMAGE_LURE' suggests a phishing tactic where a visual lure hides clickable elements leading to attacker-controlled URLs. The ClamAV detection and ML classifier further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9954

Heuristics 7

  • 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 2 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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 http://ibconsulting.it/userfiles/files/nijejobinolodulova.pdf In PDF document text
    • http://plovdivweek.com/app/templates/js/ckfinder/userfiles/files/barobidariwo.pdfIn PDF document text
    • http://www.medicellbank.com/userfiles/files/tudirevoxegewotese.pdfIn PDF document text
    • http://duancanhotot.com/upload/files/64561052651.pdfIn PDF document text
    • https://villadorottya.hu/uploads/frontend/files/82557884403.pdfIn PDF document text
    • http://allgeology.ru/ckfinder/userfiles/files/97674377603.pdfIn PDF document text
    • http://gajagotour.com/UserFiles/file/25697807175.pdfIn PDF document text
    • https://stefandes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613f32747b2d1---tukubenegefuvowofib.pdfIn PDF document text
    • http://dichthuatanhduy.com/uploads/userfiles/file/xatumidosuwakedopirisin.pdfIn PDF document text
    • http://kubabus.cz/novy-web/upload/file/76192710103.pdfIn PDF document text
    • http://tipsclubcr.com/campannas/file/burerizedamo.pdfIn PDF document text
    • http://unitez.net/images/newtech/files/43521853736.pdfIn PDF document text
    • http://jmlukanich.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/vavinakejiwit.pdfIn PDF document text
    • https://groupunsur3.com/contents/files/porokasozabip.pdfIn PDF document text
    • http://daotaoyduoc.org/wp-content/plugins/super-forms/uploads/php/files/a2232eabf6824ff32ff748a3e95a9d29/80552756271.pdfIn PDF document text
    • https://www.travelknowhowscotland.co.uk/assets/js/ckfinder/userfiles/files/pusewufagonizuji.pdfIn PDF document text
    • http://autoscuolecasetta.it/userfiles/files/narujitizaz.pdfIn PDF document text
    • http://jezirka-biobazeny.cz/UserFiles/File/44461738308.pdfIn PDF document text
    • https://apc-algercentre.dz/ckfinder/userfiles/files/jirura.pdfIn PDF document text
    • http://macabrey-luthier.fr/data/Files/lujizojuvexet.pdfIn PDF document text
    • http://safaraval.com/basefile/safaravalcom/files/wawunajin.pdfIn PDF document text
    • https://drinkpoint.com/uploads/files/38733896234.pdfIn PDF document text
    • http://xn--9w3b11kh5l.com/ckupload/files/xosonivowarelanekisimuv.pdfIn PDF document text
    • http://sbsedupatti.com/sbsedupatti/userfiles/file/gezatefusofedopetesowimu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=kamasutra+365+pdfPDF link annotation
    • 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_off0000aef5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAEF5 14380 bytes
SHA-256: 679404d9d732a7800178f7bd83a851303b51b36fc31fcb1e365fdcc3f5978bd3
font_01_sfnt_off0000d284.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD284 10728 bytes
SHA-256: c747abfd640aa36ac148008065a8a26930b50b0254ca5a1b7547369cdb2610b2
font_02_sfnt_off0000eb46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB46 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1