Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ae69dc2fcdf7a22…

MALICIOUS

PDF

83.0 KB Created: 2021-08-18 13:28:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: a93e54c6471dbb386a9553ef4b35c182 SHA-1: 5207ed1832b139e9b5cda7ef49bf948acbbb92bc SHA-256: 6ae69dc2fcdf7a2230c07e93e102a61111d9947a4092f1b6cb8c399aab3f78ad
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised CMS uploads and disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to lure users to malicious sites. No scripts were extracted, but the link farm structure is a common tactic for initial access.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 https://www.heracles-hotel.eu/wp-content/plugins/super-forms/uploads/php/files/ehc9g3ac9jpi12rkmkajhh4d40/88324493629.pdf In PDF document text
    • http://indago-rovigo.it/userfiles/files/sudulipotavif.pdfIn PDF document text
    • https://gencshow.com/upload/ckfinder/files/tofevixekutomamonuba.pdfIn PDF document text
    • http://test.uebersetzungen-nesselberger.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a9f9ebd4f5c---makobewut.pdfIn PDF document text
    • http://shangrilayunnan.com/ckfinder/userfiles/files/51203852598.pdfIn PDF document text
    • http://khamtribacninh.com/images/files/bevasipugexofagod.pdfIn PDF document text
    • https://www.geosuiteonline.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608a056ef4082---zexerotijale.pdfIn PDF document text
    • https://budapestpainter.hu/ckfinder/userfiles/files/86756719970.pdfIn PDF document text
    • http://salinahighschool1968.com/clients/3/33/33fcb9b832a528c934b1ac42c6b88a99/File/6005627836.pdfIn PDF document text
    • https://conexusinternational.com/ckfinder/userfiles/file/30094823732.pdfIn PDF document text
    • http://www.rosabrockenhaus.ch/ckfinder/userfiles/files/40847575150.pdfIn PDF document text
    • https://ketgate.eu/wp-content/plugins/super-forms/uploads/php/files/27d9f1fae126b6d93396d2a9c8648e3f/24646201909.pdfIn PDF document text
    • http://sonkertrail.org/clients/9/92/9260a3c387aed4615f72c72c3a1da295/File/vusanag.pdfIn PDF document text
    • http://bearings-home.com/userfiles/file/mexawesanakine.pdfIn PDF document text
    • http://sjhrz.com/images/upload/File/denipuxobisinuzojikali.pdfIn PDF document text
    • https://www.azembay.com/wp-content/plugins/super-forms/uploads/php/files/murfo4fsqhvrcpatt8kqniidrv/42154088437.pdfIn PDF document text
    • https://sunnyrosesschool.com/userfiles/file/90101942722.pdfIn PDF document text
    • http://saovietgroup.com/upload/FCK/file/zifarivovaxiv.pdfIn PDF document text
    • http://giasuminhtam.com/Images_upload/files/zupog.pdfIn PDF document text
    • http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160ab919febb7a---zamogopezewejilupibukosew.pdfIn PDF document text
    • https://hbfilm.ca/resimler/files/15741933587.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=twilight+full+movie+in+hindi+2008+download+hdPDF 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_off0000defa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEFA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f70c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF70C 17212 bytes
SHA-256: 574b7835a64dcb5d92e51b843d14cb5fa02762668869012af9aa5c70acade34b
font_02_sfnt_off0001241f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1241F 11196 bytes
SHA-256: 3f68e1cf3f392acfc08b84e092b7e66686cc050dfca064e386a0c075a1b0d089

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