Malicious PDF — malware analysis report

Static analysis result for SHA-256 389b35f7d654b8e0…

MALICIOUS

PDF

88.9 KB Created: 2021-08-31 10:55:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: ba859b525bee4066a2da3ca8e96c9d4c SHA-1: 7d77b6ed845415057cbae1e6a7352f856d761fe4 SHA-256: 389b35f7d654b8e0e0280d91063d4c14b97fee00e36b79086711bbecdab50965
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a link farm pointing to compromised WordPress upload directories, suggesting an attempt to distribute further malicious content. The presence of embedded URLs and the nature of the heuristics indicate a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://santchavarabed.in/ckfinder/userfiles/files/vikaz.pdf In PDF document text
    • https://www.siemers-deutschmann.de/wp-content/plugins/super-forms/uploads/php/files/74r9v7upc2879dg4la1rub1ca1/2454882186.pdfIn PDF document text
    • http://www.petersmetalstitching.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1608f5d0a5ca5b---nowafudevazozemosejonupuw.pdfIn PDF document text
    • https://www.rekalibracija.com/wp-content/plugins/super-forms/uploads/php/files/8d70e00cd4c61227169c4619fa087a70/96453489461.pdfIn PDF document text
    • https://bosgo.mn/uploads/files/47220601472.pdfIn PDF document text
    • https://etevent.itweald.com/uploads/files/612d9c08e3faf.pdfIn PDF document text
    • https://yourlightingbrand.com/wp-content/plugins/super-forms/uploads/php/files/8579ab7425017e785ddb74b51277f0c8/limamavurigu.pdfIn PDF document text
    • http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c95a5c56de6---setidobe.pdfIn PDF document text
    • https://caraudioshop.ro/mm/file/bikuduladawotawi.pdfIn PDF document text
    • https://www.drserapkagan.com/wp-content/plugins/super-forms/uploads/php/files/0emohqqqk22doe0j36vmh3qf5k/21575954940.pdfIn PDF document text
    • http://soupworld.de/upload/file/guzufu.pdfIn PDF document text
    • https://egyptsuntours.com/userfiles/files/48286082874.pdfIn PDF document text
    • http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609e00428dd89---58635897047.pdfIn PDF document text
    • http://statsale.com/data/upload/ck/files/kazokajigobobedovezif.pdfIn PDF document text
    • https://actor-conseil.com/files/file/zoxamenodavofiloguresibas.pdfIn PDF document text
    • http://lapenya.cat/imgjovesnaves/file/buvigeramawewokepurararol.pdfIn PDF document text
    • https://divorcioconsensual.com.br/wp-content/plugins/super-forms/uploads/php/files/46e6e0b4d7c647dec48da79303f21374/xufeva.pdfIn PDF document text
    • http://www.trimbleexpress.sk/wp-content/plugins/formcraft/file-upload/server/content/files/16086741a02135---puwozoxep.pdfIn PDF document text
    • http://theopenhouseclub.com/wp-content/plugins/super-forms/uploads/php/files/df6eba3641dbb2687b834e552421018d/51017537138.pdfIn PDF document text
    • https://rosettes.it/userfiles/file/selanomubuxarupuwav.pdfIn PDF document text
    • http://phenix-security.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160820b7e0d10f---lebiganojujalidip.pdfIn PDF document text
    • http://topspeed4wd.com/ckfinder/userfiles/files/78914487732.pdfIn PDF document text
    • https://www.northernillumination.com/wp-content/plugins/super-forms/uploads/php/files/eeca7aefc5e1db0f1ed83f631368907f/95002161279.pdfIn PDF document text
    • https://www.emma-solutions.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609c1ff4f158b---kinetufolunelijiroxi.pdfIn PDF document text
    • http://tecs4.com/intranet/ckfinder/userfiles/files/naxesixomoxamokofe.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=the+meaning+of+juneteenthPDF 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_off0000f598.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF598 18860 bytes
SHA-256: ac4aad4681e64def402cd7bf954aa18727887ba0ea8b16cd36c3ca657be1d353
font_01_sfnt_off000126b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126B7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013ece.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13ECE 10540 bytes
SHA-256: bfc92eb0f73ff17776e644fb7b4bd1a630664c18c3e945c0df394d2828836188