Malicious PDF — malware analysis report

Static analysis result for SHA-256 48ed616bb3833ed4…

MALICIOUS

PDF

79.8 KB Created: 2021-09-01 09:27:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 14e5da54faa2c0fedaa80293994e266b SHA-1: 430e027b4ca96721cba175bc372d38d516da4e4c SHA-256: 48ed616bb3833ed4607f23ec54702e9e8438f29b8eb7b071aa1331dbd8ab51bf
156 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically identified as a phishing trojan. It functions as a link farm, containing numerous URLs pointing to compromised CMS uploads and disposable hosting, likely intended to redirect users to malicious sites for phishing or malware delivery. The PDF structure itself does not contain executable scripts, but its primary function is to facilitate access to external malicious resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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
  • 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.
  • 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://shopcloud.cloud//ckfinder/userfiles/files/dalatikuguwumo.pdf In PDF document text
    • http://somkuthyoptika.hu/editor_up/40988116511.pdfIn PDF document text
    • https://laurallo.com/ckfinder/userfiles/files/megurajufazasijur.pdfIn PDF document text
    • https://www.auditek.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607f17d3e6f1b---10876659497.pdfIn PDF document text
    • http://zpb-maciejewski.pl/upload/fck/file/8791199394.pdfIn PDF document text
    • https://ketex.com/trcgp/ckfinder/userfiles/files/36268387577.pdfIn PDF document text
    • http://salon-urody-bellis.pl/images/file/55913991868.pdfIn PDF document text
    • https://synersys.fr/contenu/file/widup.pdfIn PDF document text
    • https://www.saltriot.com/wp-content/plugins/super-forms/uploads/php/files/87f9ed86544b79a205216b9b604b633a/75905344094.pdfIn PDF document text
    • http://xn--80akij1ajew.xn--p1ai/wp-content/plugins/formcraft/file-upload/server/content/files/1610a61cd35352---tumutadadizogokap.pdfIn PDF document text
    • https://aspaeng.com/files/image/files/93306127054.pdfIn PDF document text
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/75226ca132f3e72bf9a13c0e055cc491/wiposilas.pdfIn PDF document text
    • https://biocoils.com/img/file/91845633766.pdfIn PDF document text
    • https://forex-robo.org/wp-content/plugins/super-forms/uploads/php/files/fc6cf1bbf2e3ed1cbefbd72aeeacc72e/dasedipoxaxebopesup.pdfIn PDF document text
    • http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610845a027f6f---50998814050.pdfIn PDF document text
    • http://faxik.ru/ckfinder/userfiles/files/soxitudusisopamekosivin.pdfIn PDF document text
    • https://burgas-remonti.com/userfiles/file/46018224662.pdfIn PDF document text
    • http://drshapard.com/clients/73598/File/247666033.pdfIn PDF document text
    • https://grupo-bahia-real-estate.com/ckfinder/userfiles/files/64870905972.pdfIn PDF document text
    • https://www.prowallpanama.com/wp-content/plugins/super-forms/uploads/php/files/1d1b158fc8bb5da18bcd8bc30dc76338/vubonodujut.pdfIn PDF document text
    • https://christembassyromford.org/wp-content/plugins/super-forms/uploads/php/files/e03848ee95276c2e66b0d13d37981694/siwajuwulosilatep.pdfIn PDF document text
    • http://fonnepal.org/userfiles/file/muvuzeboxubudopinenu.pdfIn PDF document text
    • https://euforbiabulgaria.com/uploads/pages/files/54965978376.pdfIn PDF document text
    • https://gadesign52.com/uploads/files/202108291010548841.pdfIn PDF document text
    • http://abwjefferson.com/uploads/files/43129624787.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=the+lonely+island+tourPDF 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_off0000d4fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4FB 10524 bytes
SHA-256: 9b4335e968e1db39c0906cb2f7c641aaff522d8c20686c7599812156e38f73cf
font_01_sfnt_off0000eceb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECEB 17300 bytes
SHA-256: 04c525deb82b73b6ae0277cf76767b7d9e12a69d1b282fec22f16909114952f6
font_02_sfnt_off000119e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119E4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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