Malicious PDF — malware analysis report

Static analysis result for SHA-256 07e42c86a9084723…

MALICIOUS

PDF

74.3 KB Created: 2021-09-20 04:23:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: f9be07092c89150d5f4ac4fed874809c SHA-1: 58a0c6abe119c0a7460e103eb783bc094ffc63f7 SHA-256: 07e42c86a90847232f86a6579b7491a98cec3ba2865c877635e86ff3c2d97f85
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which are hosted on disposable domains and appear to be part of a link farm. The primary function seems to be redirecting users to external sites, potentially for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 https://nomylo.ru/uplcv?utm_term=clash+of+clans+sneak+peek PDF link annotation
    • http://adhdesign.de/userContent/files/20210919123514-sawifalave.pdfIn PDF document text
    • https://divanich96.ru/admin/ckfinder/userfiles/files/3552715998.pdfIn PDF document text
    • http://3gr-group-com.gbintl.com/ci/userfiles/files/63670767014.pdfIn PDF document text
    • https://promenade-perpignan.com/userfiles/file/2066098432.pdfIn PDF document text
    • http://fullcolorspandoeken.nl/userfiles/file/99964432442.pdfIn PDF document text
    • https://emilline.dk/ckfinder/userfiles/files/sanolarugavemol.pdfIn PDF document text
    • http://psychanalyste-gard.fr/ckfinder/userfiles/files/63151108371.pdfIn PDF document text
    • http://tjsijiqing.com/ckfinder/userfiles/files/2021/0910/ae0bbab922d72b75d67f3c92050dd7a3.pdfIn PDF document text
    • https://gdaniec.com/upload/files/17166688767.pdfIn PDF document text
    • http://pyhunlian.com/uploadfile/file/kulafowuwudogo.pdfIn PDF document text
    • http://awarelaxcentrum.cz/user_files/file/95708865874.pdfIn PDF document text
    • http://ozdesignhouse.com/app/webroot/uploads/files/31838636525.pdfIn PDF document text
    • http://rubella2.integra-sh.com/userfiles/file/furadepojem.pdfIn PDF document text
    • http://kingcraftviet.com/uploads/ckfinder/files/66742298770.pdfIn PDF document text
    • http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/161413a77b9d1a---51382905186.pdfIn PDF document text
    • http://www.fullmooneye.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140693f03cce---lululefunupoguwepu.pdfIn PDF document text
    • https://ebooksweb.net/files/file/joralukolulukavuvexepox.pdfIn PDF document text
    • https://vipbeachhouse.com/uploads/editor/file/23725868153.pdfIn PDF document text
    • https://areicon.com/images/file/34362905305.pdfIn PDF document text
    • http://89928386.com/uploads/files/202109070932399109.pdfIn PDF document text
    • http://cjmfgxfollow.morefriendship.com/upload/files/lelidurasureruxuzela.pdfIn PDF document text
    • http://xn--sanitrprofi-p8a.ch/fckeditor/editor/images/file/20054393478.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_off0000bf5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF5A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d771.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD771 10412 bytes
SHA-256: a50da0126068d21e1848296367c673341bc003d51982c7e619ade8e1b13a6a62
font_02_sfnt_off0000ef00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF00 17352 bytes
SHA-256: 9f2316e5dc63857215be2b0fa91b0be8026d3ac93b54e0b2429f65c01cd6d047

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