Malicious PDF — malware analysis report

Static analysis result for SHA-256 09e6b0f31f1c01e3…

MALICIOUS

PDF

67.9 KB Created: 2021-09-26 22:20:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: fe26049e4393b3fe7ea036cd85eaf9dc SHA-1: e6ebae8d9c40efccf3727e9c8715c422b388b031 SHA-256: 09e6b0f31f1c01e3d0166c465055e4eb4f67585bdac55f238f9baabc5743f3cb
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file is identified as malicious by ClamAV and an ML classifier, and it contains embedded JavaScript. Heuristics indicate it's an image-only document designed as a lure, with a click-outward action pointing to external URLs. The document body is heavily obfuscated, but the presence of embedded JS and the overall structure strongly suggest it's intended to redirect users to malicious sites for phishing or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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 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.
  • 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://szzxwx.com/Upload/Upload/file/20219262347514766.pdf In PDF document text
    • https://smlstripedbass.com/home/rock/public_html/ckfinder/userfiles/files/4158140243.pdfIn PDF document text
    • http://giaydantuongphongngudep.com/images/news/file/84131145626.pdfIn PDF document text
    • http://divorce-difficile.fr/userfiles/file/64325879418.pdfIn PDF document text
    • http://xn--90aoaidn.xn--p1ai/ckfinder/userfiles/files/jugav.pdfIn PDF document text
    • http://feriaalainversa.com/uploaded/files/68023144199.pdfIn PDF document text
    • https://decisionstogo.com/fck_image/file/tadewekitubejanasugubu.pdfIn PDF document text
    • https://www.totspotdaynursery.co.uk/ckfinder/userfiles/files/28161649841.pdfIn PDF document text
    • http://www.mamafoundation.cz/ckfinder/userfiles/files/mizilisilugiwi.pdfIn PDF document text
    • https://norservis.com/files/files/91590422853.pdfIn PDF document text
    • http://asesorialuishervas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d0e77f3f47---mabepolovuzi.pdfIn PDF document text
    • https://matricula.arendic.cl/files/9563158345.pdfIn PDF document text
    • http://adimhukuk.com/resimler/files/maxigatupalenodisunexevu.pdfIn PDF document text
    • http://paulgraphics.paulsfashion.in/files/sujeluliwu.pdfIn PDF document text
    • https://vjlabor.pitscovn.com/uploads/Upload/files/tezomutovatuseleruvo.pdfIn PDF document text
    • https://open-call.fr/uploaded/files/xebonuwisedutib.pdfIn PDF document text
    • http://zonwering-belgie.be/ckfinder/userfiles/files/kenafojadasu.pdfIn PDF document text
    • http://daieimotors.com/js/upload/files/jatidex.pdfIn PDF document text
    • http://bippex.com/filespath/files/20210924013106.pdfIn PDF document text
    • https://balmbeach.hometeamcorp.com/images/usr/bepiperuwa.pdfIn PDF document text
    • https://lwim-ouargla.dz/ar/files/difijofu.pdfIn PDF document text
    • http://oticonshop.com/ckfinder/userfiles/files/gavarirotapu.pdfIn PDF document text
    • http://novena99.com/uploads/files/202109151205034872.pdfIn PDF document text
    • http://alptw.com/images/files/17908632967.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=tawakkalna+app+play+storePDF 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_off0000ad4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAD4F 10408 bytes
SHA-256: 9d83df902b42f7f668073258b37c4ff0ee6737a9b54f0902b241eddfc58a3907
font_01_sfnt_off0000c52b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC52B 14052 bytes
SHA-256: 099c6a7bd67096e5a1dbd1eab7c8dfc178674fde69f5849622045d7b09427068
font_02_sfnt_off0000e7c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7C5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1