Malicious PDF — malware analysis report

Static analysis result for SHA-256 06e205ec4c41a13e…

MALICIOUS

PDF

76.6 KB Created: 2021-08-27 14:49:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 48f0c7ce6d69b426aebd5708041930c1 SHA-1: 075aebf9e977e526df8e364351c81f503cdc9eaf SHA-256: 06e205ec4c41a13ea8c2c1ea344dd0d95f96eba451252b0607f99a8fff8d306d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It functions as a link farm, containing numerous URLs that point to external websites, some of which are hosted on compromised CMS platforms. The presence of these links suggests an attempt to lure users to malicious sites, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 6

  • 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.
  • 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://sts-logistika.ru/wp-content/plugins/super-forms/uploads/php/files/4a48b503eb85944e3a0f2d3259494cf4/86281201390.pdf In PDF document text
    • https://kalatranslation.co.uk/wp-content/plugins/super-forms/uploads/php/files/vt650v8nru91reanom1s78cjn7/rorabejunaneko.pdfIn PDF document text
    • http://poorclarescork.ie/images/61301291352.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d97db45ea64---19641394808.pdfIn PDF document text
    • https://balbok.net/admin/ckfinder/userfiles/files/kegavitesowe.pdfIn PDF document text
    • http://www.marcelasemper.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d46dc85625---90750798601.pdfIn PDF document text
    • http://yogaschoolofkerala.com/photos/editor/files/matelijum.pdfIn PDF document text
    • http://global-gypsum.com/wp-content/plugins/formcraft/file-upload/server/content/files/160895b6da64c7---jibirutodejewolodezos.pdfIn PDF document text
    • http://zonwering-belgie.com/ckfinder/userfiles/files/doposufujidi.pdfIn PDF document text
    • https://moniimpex.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d8a8faeb344---minag.pdfIn PDF document text
    • http://myconnect-thailand.com/image/upload/File/53049931947.pdfIn PDF document text
    • http://www.maderas-navarro.com/ckfinder/userfiles/files/63648336921.pdfIn PDF document text
    • https://nscs.org/wp-content/plugins/super-forms/uploads/php/files/30069a207fb2711d587f14573d7b88c3/39574163035.pdfIn PDF document text
    • http://vankouwenenmastop.nl/UserFiles/file/bebejogi.pdfIn PDF document text
    • https://rffsev.ru/wp-content/plugins/super-forms/uploads/php/files/5f0ba4bddd8ea170d722861ba3e70273/fedavedabafu.pdfIn PDF document text
    • http://wbbray.com/wp-content/plugins/formcraft/file-upload/server/content/files/16105472e24917---gexowosusowujaditod.pdfIn PDF document text
    • https://stef-nancy.fr/upload/document/rusapaxutanuxaziga.pdfIn PDF document text
    • https://autosofortkauf.ch/wp-content/plugins/super-forms/uploads/php/files/ae00o9fubtkmq4fb5itm23gkql/nodiseg.pdfIn PDF document text
    • http://masan315.net/board/imagefile/file/11594935555.pdfIn PDF document text
    • https://sweetburden.com/upload/users/files/43489828706.pdfIn PDF document text
    • http://esistore.lu/userfiles/file/19545930154.pdfIn PDF document text
    • http://kayapaliinsaat.net/file/lepebopasopux.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=lcm+of+11+and+6PDF 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_off0000ca2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA2E 16868 bytes
SHA-256: eb1488524becfd7d1c1dca135c268e7efb8976d4afef61c65507115bd480b1ea
font_01_sfnt_off0000f542.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF542 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010d59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D59 10180 bytes
SHA-256: 0dcb8580a707b5247c3e45f919e25e2201754da345c382960cb6494c87565dd2

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