Malicious PDF — malware analysis report

Static analysis result for SHA-256 e60f33d04c8de6d1…

MALICIOUS

PDF

71.4 KB Created: 2021-10-01 07:20:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 84f3b4c9505fd1eb68173739a1f97dc2 SHA-1: 248cbf1f5c920ab62f21e746efcab8343ae267bc SHA-256: e60f33d04c8de6d18d9b321799d968da408e621e234b253f9b535ae5cc7a1a5c
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which are hosted on compromised or disposable domains, indicating a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution. The embedded JavaScript is likely used to facilitate the redirection or exploit vulnerabilities.

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://irlanc.ru/uplcv?utm_term=adb+not+working PDF link annotation
    • http://marathon-gexin.com/Uploadfiles/files/lijeve.pdfIn PDF document text
    • http://ascensionchina.com/userfiles/file/kixitegud.pdfIn PDF document text
    • http://webinaris.eu/ckfinder/userfiles/publics/files/82062909602.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/06d58007f5a1968a2ab0e2667b2590c3/79815408990.pdfIn PDF document text
    • http://tofuyatogo.com/uploads/files/53470399610.pdfIn PDF document text
    • https://drticket.ir/basefile/drtiketcom/files/9621069955.pdfIn PDF document text
    • http://elskup.pl/images/assets/file/seturimivujap.pdfIn PDF document text
    • http://maezawa-jidousha.com/js/upload/files/13572419952.pdfIn PDF document text
    • http://labellebeaute.com.hk/ckfinder/userfiles/files/28222498866.pdfIn PDF document text
    • http://www.tenniscanberra.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/161437808c6ca7---bumaxifij.pdfIn PDF document text
    • http://chieusangducphat.com/uploads/userfiles/file/dawawafejavamilujaj.pdfIn PDF document text
    • https://atavio.ru/files/file/xanowup.pdfIn PDF document text
    • http://tuttotop.com/userfiles/files/dotisan.pdfIn PDF document text
    • http://studiotecnicobergamaschi.it/userfiles/files/fegobidozifisereduno.pdfIn PDF document text
    • https://rawoctane.com/uploads/file/53732842556.pdfIn PDF document text
    • https://alpasol.e-giant.net/upload/files/bipopi.pdfIn PDF document text
    • http://garantc.ru/userfiles/file/werovaseximawaludeterebu.pdfIn PDF document text
    • http://driver-jazda.pl/upload/file/14019094692.pdfIn PDF document text
    • http://icaalliance.org/filespath/files/20210919143621.pdfIn PDF document text
    • http://metamorfoza-krosno.pl/userfiles/file/84447677033.pdfIn PDF document text
    • https://www.andimoda.com/wp-content/plugins/super-forms/uploads/php/files/172814dde48e69d574d57cf5357d4499/78361293760.pdfIn PDF document text
    • http://kronospan-mofa-hungary.hu/editor_up/31323356054.pdfIn PDF document text
    • http://tsradviseurs.nl/mailing/images/photo/file/lagijubeguwisevulivuxesem.pdfIn PDF document text
    • https://www.ruchya.com.tw/upload/files/5270175002.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_off0000b5cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB5CF 16924 bytes
SHA-256: d94b38372ef7d35d5623f0690f54db959569c0b60dbe2d24418758e26b09a833
font_01_sfnt_off0000e124.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE124 10212 bytes
SHA-256: d5cf3096c7289782d3bed24132223fcc47fffa2fff50656baea71525b897e5e5
font_02_sfnt_off0000f7fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7FA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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