Malicious PDF — malware analysis report

Static analysis result for SHA-256 d333459b5a3e43ef…

MALICIOUS

PDF

70.0 KB Created: 2021-09-25 16:58:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 1f2007569da2dbc33740b0921ac4bd68 SHA-1: 6cbf2fd1d3f9e50ba580c8de27e18c98c3ae29b5 SHA-256: d333459b5a3e43ef9a3212b806322351706a986524743c6bc9d36ff33c38e278
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by multiple heuristics, including ML and ClamAV, indicating malicious content. It contains numerous embedded URLs pointing to various domains, many of which appear to be part of a link farm or hosted on compromised sites. The presence of 'utm_term' parameters suggests a phishing or SEO poisoning attempt to lure users with search terms like 'hard reset locked android phone'. No scripts were extracted, but the overall structure and URL distribution strongly suggest a phishing or malware distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9849

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 https://cructi.ru/uplcv?utm_term=hard+reset+locked+android+phone PDF link annotation
    • http://zoop-tech.com/ckfinder/userfiles/files/25019450.pdfIn PDF document text
    • http://rtm-plus.com/ckfinder/userfiles/files/wesuvetazuram.pdfIn PDF document text
    • http://tpokebar.com/uploads/files/mozej.pdfIn PDF document text
    • http://myappartement.de/web/editor/files/25286790829.pdfIn PDF document text
    • https://bozoklar.org/ckfinder/userfiles/files/supipamiwisakixis.pdfIn PDF document text
    • http://kennycojewelry.com/userfiles/files/202109/1631751519.pdfIn PDF document text
    • http://maxgear.cz/webpagebuilder/ckfinder/userfiles/files/dawefobufapafifetawazu.pdfIn PDF document text
    • http://nowator-zpu.pl/userfiles/file/tividuwulalesezo.pdfIn PDF document text
    • https://mancomunidadvaldizarbe.com/userfiles/files/bobarutem.pdfIn PDF document text
    • http://joyandwowbook.com/upload/file/4014432685.pdfIn PDF document text
    • http://www.naturapreserved.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614049bed49a5---50898196426.pdfIn PDF document text
    • https://chatham-ebenezer.ckdomain.com/uploads/userfiles/files/16937074538.pdfIn PDF document text
    • http://skidubravy.sk/spravca/ckfinder/userfiles/files/92747578450.pdfIn PDF document text
    • https://fonixkoncert.hu/upload/file/67744310335.pdfIn PDF document text
    • http://crosswaysrecruitment.com/userfiles/file/kewuziworotabukinisog.pdfIn PDF document text
    • http://angelofthewinds.org/ckfinder/userfiles/files/20250638576.pdfIn PDF document text
    • http://xn--e1aaafipco3bk8gra3b.xn--p1ai/upload_picture/file/61312480250.pdfIn PDF document text
    • http://tanriovermensucat.com/uploads/genel/files/kofajivivujoruwagida.pdfIn PDF document text
    • http://anm-av.de/uploads/files/runaxitugumejases.pdfIn PDF document text
    • http://haiannweb.com/uploads/files/92370338547.pdfIn PDF document text
    • http://mountmedpharmacy.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16144bd8223d9b---39929966430.pdfIn PDF document text
    • http://195exim.com/datas/files/71099185417.pdfIn PDF document text
    • http://worldprint.su/userfiles/file/43491033272.pdfIn PDF document text
    • http://extreamtuning.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16142ecdfcb22e---vegoxewinijomajakemuli.pdfIn PDF document text
    • http://vinhomeshaiphong.net/app/webroot/img/files/43038979547.pdfIn PDF document text
    • https://nocrime.cntwn.org/ckfinder/userfiles/files/67900768904.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_off0000b25d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB25D 10692 bytes
SHA-256: e1da9af52932e9b71e9be8ba9c77b948d63bc6e9a0a07db1a13964e6d629d7cc
font_01_sfnt_off0000cabf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCABF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e2d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2D1 15752 bytes
SHA-256: 06c4f132434577d92ad8dce271631842cfa7d3fe3921aa0260b2c97fb94e16a7

Open this report in the interactive analyzer, or submit your own file for analysis.