Malicious PDF — malware analysis report

Static analysis result for SHA-256 070a2356bfc04ed6…

MALICIOUS

PDF

78.3 KB Created: 2021-09-23 07:46:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 3b9d13b4b4d609a2a809477eb7cc6127 SHA-1: 28d278b0b3896a5be10ce02e66a6632c5a70385f SHA-256: 070a2356bfc04ed6f8770d496c80238d174c7bcca0b6fd5b039a3a92b2212a99
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF file contains embedded JavaScript and multiple URLs, some pointing to raw IP addresses, which are indicative of malicious activity. The heuristic firings, particularly the ML classifier and ClamAV detection, strongly suggest this is a malicious PDF, likely used for phishing or to deliver a second-stage payload. The embedded JavaScript is likely responsible for redirecting the user to one of the malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://smidgel.ru/uplcv?utm_term=mobile+legend+bang+bang+android PDF link annotation
    • https://www.lipfish.no/wp-content/plugins/formcraft/file-upload/server/content/files/161468b29d0f7a---dejulamusizunirorowa.pdfIn PDF document text
    • http://gyndoktors.de/ckfinder/userfiles/files/76729027260.pdfIn PDF document text
    • http://njchemland.com/upload/files/wapebezunerijusojan.pdfIn PDF document text
    • http://hlqh.net/userfiles/file/20210921041727_491247422.pdfIn PDF document text
    • https://bleikss.com/userfiles/file/99434704798.pdfIn PDF document text
    • https://pacantioquia.org/aym_image/files/laxoranipekap.pdfIn PDF document text
    • https://tecnicadovolante.com/images/file/napodotujodikin.pdfIn PDF document text
    • https://mgs-on-track.com/uploads/misc/files/rozat.pdfIn PDF document text
    • https://lashmakerpro.it/wp-content/plugins/super-forms/uploads/php/files/scri2rjo4l6mik43agoqt4mip5/tepuvulamafigusonuwisena.pdfIn PDF document text
    • http://ahknchem.com/upload/files/poxisu.pdfIn PDF document text
    • http://twinmd.ru/userfiles/file/giwuseniruvajodonaj.pdfIn PDF document text
    • https://edusfera.pl/upload/file/83963718480.pdfIn PDF document text
    • http://www.gonouvellezelande.com/files/koberasadiretelejaluxo.pdfIn PDF document text
    • https://hgqq.hk/tony/churchofgod/ckfinder/userfiles/files/9363638715.pdfIn PDF document text
    • http://riskhedgetech.com/uploaded/file/235759287613c868d731c1.pdfIn PDF document text
    • http://www.polni.si/Images/files/wunodomomimu.pdfIn PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/16147a2919852c---pufumonatigivuxapesit.pdfPDF link annotation
    • http://architettoletiziamasciotta.eu/userfiles/files/kurodigusafokifuri.pdfIn PDF document text
    • https://soudurelauziere.com/upload/editor/file/godawafox.pdfIn PDF document text
    • http://bsa-billiard.by/images_from_html_editor/file/pemaxaduxenariwup.pdfIn PDF document text
    • https://manorhair.com/uploads/files/202109171818263234.pdfIn PDF document text
    • https://cjsc.se/ckfinder/userfiles/files/68142912743.pdfIn PDF document text
    • http://cps-mbstu.edu.bd/app/webroot/js/ckfinder/userfiles/files/lavinewugupewevimosulil.pdfIn PDF document text
    • http://vencedor.coop/images/admin/file/dukibumel.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_off0000d03e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD03E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e850.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE850 17152 bytes
SHA-256: 587aede855cf21d6e738e1b999bef3803404e38f77adade5af81e28e385891ec
font_02_sfnt_off0001148f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1148F 10288 bytes
SHA-256: 1b83657204a32eecb9ce10a865d7ab1fe1802103d2f5455d7e9a3e3a378a4a7d