Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd02f6a36d05be99…

MALICIOUS

PDF

66.7 KB Created: 2021-09-13 15:25:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 5060b56b0baad3819453ed74dd8c4bc2 SHA-1: e04eadb14e8f0d2b16ee42462c4c95efe5c25d0e SHA-256: bd02f6a36d05be99165283c32c20e1209aa55545f1cd580c5ce79949f8091f16
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document exhibits characteristics of a phishing lure, employing an image-based interface to trick users into interacting with embedded links. The presence of embedded JavaScript and numerous external URIs, many pointing to potentially disposable domains, suggests an attempt to redirect users to malicious content or initiate further downloads. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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 0 text block(s), carries a click-outward action, and is only 66 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 https://safetypadlocks.eu/eurostyl/photos/file/53350107789.pdf In PDF document text
    • http://xn--4k0b43gkwo4gn.com/upload/editor/file/jobanapadusorudiwomegewa.pdfIn PDF document text
    • https://xn----7sbbg1ddpkdc.xn--j1amh/uploads/files/88838883961.pdfIn PDF document text
    • https://dpt-mh.com/uploads/news/files/kiteboxulojupaba.pdfIn PDF document text
    • http://retco.ge/ckfinder/userfiles/files/3948906999.pdfIn PDF document text
    • https://badanie-wody.pl/galeria/file/41204537555.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613c9a59eece7---59617910040.pdfIn PDF document text
    • http://recit-de-vie.fr/userfiles/file/42153775678.pdfIn PDF document text
    • http://hzzxtl.com/UploadFile/file/20210913130202861.pdfIn PDF document text
    • https://imad0c0.com/js/ckfinder/userfiles/files/wijusesosepito.pdfIn PDF document text
    • https://robustbrakes.com/administrator/imagetemp/file/67474474568.pdfIn PDF document text
    • http://autosoftware.company/autoresponders_images/files/jeziwevawetekojasax.pdfIn PDF document text
    • http://hidropro.hu/upload/32978873569.pdfIn PDF document text
    • https://enkaotomatikkapi.com/depo/sayfaresim/file/41546161601.pdfIn PDF document text
    • http://dichvu12h.net/userfiles/file/zeweloxesofotun.pdfIn PDF document text
    • https://mallorcaboom.com/res/wysiwyg/file/sowufometebeli.pdfIn PDF document text
    • https://sfasg.jp/js/ckfinder/userfiles/files/72348644083.pdfIn PDF document text
    • http://origo.ws/userfiles/file/lajivumofuzikinurubitif.pdfIn PDF document text
    • http://hatowo.com/app/webroot/uploads/files/pitadinimasodutusorobuzi.pdfIn PDF document text
    • http://kisito.com/userfiles/file/tagoj.pdfIn PDF document text
    • http://photou.cc/ckfinder/userfiles/files/39338692768.pdfIn PDF document text
    • https://pilot-nav.com/ckfinder/userfiles/files/99484092802.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=vpn+hub+pro+mod+apkPDF 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_off0000ab3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAB3D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c34f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC34F 13880 bytes
SHA-256: 84c7a16f9cef9c012edb3c4b1db9e0a2127995dfd8721201511e74bb5bbc8e9b
font_02_sfnt_off0000e53a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE53A 10424 bytes
SHA-256: f0b32f88ed5bca3616341b5990ba1e8dd38fcd7fb35a7b463555429432929c3c