Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b153606aed544e1…

MALICIOUS

PDF

69.1 KB Created: 2021-10-03 17:56:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 7c4c16dd78fd200c9a942b192d6b8b5f SHA-1: 4916c885813e8c6ca255ea8a6541b723cbc67247 SHA-256: 0b153606aed544e16a1e0940c2cfd1133963a1e4d2ac3436c1b42f39f93e8aa4
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains embedded JavaScript and numerous external URIs, indicating it is designed to lead users to malicious websites or download further payloads. The 'PDF_IMAGE_LURE' heuristic suggests a common phishing tactic where a visual lure hides clickable actions. The ML classifier and ClamAV detection strongly support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

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 1 text block(s), carries a click-outward action, and is only 69 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://oniceh.ru/uplcv?utm_term=ghost+adventures+is+it+real PDF link annotation
    • http://ciccioinpentola.com/userfiles/files/zamumumajaf.pdfIn PDF document text
    • http://centrons.com/uploaded/file/129079915613680c5eb13a.pdfIn PDF document text
    • http://www.gpkoaee.ru/ckfinder/userfiles/files/19263191522.pdfIn PDF document text
    • http://caycanhtuyhien.com/uploads/image/files/53584802490.pdfIn PDF document text
    • https://dental-essence.com/admin/userfiles/file/16280724272.pdfIn PDF document text
    • http://transchem-tech.com/Uploadfiles/files/55982852331.pdfIn PDF document text
    • http://przybyszewski.org/image/file/zuruminasibikobol.pdfIn PDF document text
    • http://jullien38.com/ressource/site-image/files/93866813216.pdfIn PDF document text
    • http://ltmetal.com/userfiles/files/59029067175.pdfIn PDF document text
    • http://sun-green.nl/ckfinder/userfiles/files/23769550146.pdfIn PDF document text
    • https://ietc-oman.com/userfiles/files/60328806475.pdfIn PDF document text
    • http://hiace-yoshikawa.com/js/upload/files/35892848122.pdfIn PDF document text
    • http://pickup-ws.com/userfiles/files/lexuvomowefazonoxaxe.pdfIn PDF document text
    • https://nuteuit.ro/ckfinder/userfiles/files/87603034827.pdfIn PDF document text
    • https://oneremote.ru/wp-content/plugins/super-forms/uploads/php/files/48834c67d33823c4610a25736d3ea394/63502222252.pdfIn PDF document text
    • http://khodahoanglang.com/admin/webroot/upload/image/files/jaduji.pdfIn PDF document text
    • http://havefuntogether.com/image/upload/File/20198129775.pdfIn PDF document text
    • https://www.getfitcrew.com/wp-content/plugins/formcraft/file-upload/server/content/files/16156420a22b90---jetadanebila.pdfIn PDF document text
    • https://www.lire-les-notes.com/ckfinder/userfiles/files/jojubujujunudimozakebezal.pdfIn PDF document text
    • http://faurau.com/luodan/images/userfiles/file/96677341289.pdfIn PDF document text
    • https://svetplus.com/userfiles/files/30917877822.pdfIn PDF document text
    • http://emanuelmlevin.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/jubovu.pdfIn PDF document text
    • https://beeshark.ro/app/webroot/files/userfiles/files/duvater.pdfIn PDF document text
    • http://autosoftware.company/autoresponders_images/files/biwusavopigozezazufo.pdfIn PDF document text
    • https://calienglish.com/ckfinder/images_store/files/25503863671.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_off0000b08d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB08D 14584 bytes
SHA-256: f522fa53153307523bee02d33c5c964da52917923daad1a0106666765ac69783
font_01_sfnt_off0000d53b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD53B 10552 bytes
SHA-256: e1b85cbb7cbeda66abc1bad9be91a38d61e4562dad492df5bbd56f0e7b2c0271
font_02_sfnt_off0000ed4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED4B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1