Malicious PDF — malware analysis report

Static analysis result for SHA-256 d60b36031e396e0f…

MALICIOUS

PDF

67.9 KB Created: 2021-09-25 02:17:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 6b80bf864e7c62562b37d975d950b979 SHA-1: 799a3d651d38721f039f1a2d5de79a922dea7f0a SHA-256: d60b36031e396e0f84fd6810822d57d9084f4204eed7dc9fbea64bdec2e2d786
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF exhibits characteristics of a phishing lure, including an image-only design and a clickable action trigger. It contains numerous embedded URLs, many of which point to disposable or potentially compromised domains, suggesting a link farm used for redirection. The ClamAV detection and ML classifier strongly indicate malicious intent, likely to redirect users to a malicious site for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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 1 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.
  • 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://elitaliaweb.it/upload/file/49059737358.pdf In PDF document text
    • http://mountmedpharmacy.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/161419889388ce---winekajedadowilunexibuni.pdfIn PDF document text
    • http://safeabortionnepal.com/userfiles/file/sizosirer.pdfIn PDF document text
    • https://conexus-study-abroad-travel.com/ckfinder/userfiles/file/26474546839.pdfIn PDF document text
    • http://autokolcsonzoszolnok.hu/admin/fck_upload/file/54618260508.pdfIn PDF document text
    • http://pzhjintai.com/upload/files/dibodivawe.pdfIn PDF document text
    • https://eniedu.com/data/file/20210921121759.pdfIn PDF document text
    • http://winfielddeli.com/ckfinder/userfiles/files/surofoxidisurigi.pdfIn PDF document text
    • http://gamboeng.com/assets/ckfinder/userfiles/files/83845130180.pdfIn PDF document text
    • http://www.asap-recruitment.net/upload/file/nudimoxej.pdfIn PDF document text
    • http://shangrilatheshow.com/ckfinder/userfiles/files/90758769445.pdfIn PDF document text
    • http://newcityhk.com/userfiles/dixapuxamose.pdfIn PDF document text
    • https://prestinieurope.ch/userfiles/files/tikokelada.pdfIn PDF document text
    • http://mannaz.pl/userfiles1/file/vepilofosif.pdfIn PDF document text
    • http://studiosantomauro.it/userfiles/files/17892932454.pdfIn PDF document text
    • http://johnmarzillier.com/ckfinder/userfiles/files/zevowowotu.pdfIn PDF document text
    • http://forter.vn/hinhanh/file/53837234422.pdfIn PDF document text
    • http://agriturismoilnoceto.com/userfiles/files/fixivipotagog.pdfIn PDF document text
    • https://cbconsulting112.ca/userfiles/files/16453521168.pdfIn PDF document text
    • https://keyseries.us/userfiles/file/95978679438.pdfIn PDF document text
    • https://xn--1--8kcai1ck2bs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/dec60962d9c392399686dc46c5be6d79/sividepuxofexapituxa.pdfIn PDF document text
    • http://divyabodhanam.org/userfiles/file/fuzulap.pdfIn PDF document text
    • https://miaousland.fr/ckfinder/userfiles/files/fixilikowodulatedifewulid.pdfIn PDF document text
    • http://bluecars.pl/userfiles/file/xemilojomidile.pdfIn PDF document text
    • https://millersexpress.com/userfiles/file/1645760778.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=hry+pre+androidPDF 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_off0000b088.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB088 14284 bytes
SHA-256: 267665bc13682f8e2fa8a1ba60b8dddd62417d48a48f877f67424183cf178eef
font_01_sfnt_off0000d3af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3AF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ebc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBC6 10180 bytes
SHA-256: 5ad04d801e8269537d2ba235e68bdb8f1e4b7f88373d613fef760510b834990f