Malicious PDF — malware analysis report

Static analysis result for SHA-256 4465d7418066467d…

MALICIOUS

PDF

89.0 KB Created: 2021-09-07 09:33:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 8f450cc871964c04c34c58e1c494e96a SHA-1: 7174722fae239b2b9885eb51af1d6000f5a7d162 SHA-256: 4465d7418066467db0c7599d352585ade9efd48b106bea98fb5f80fc85fc7df6
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to numerous domains, many of which are associated with compromised CMS uploads or disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to exploiting vulnerabilities or delivering further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://automotiveenergy.cz/userfiles/file/dubetiwusoligirabaxevimix.pdf In PDF document text
    • http://www.thediethub.in/wp-content/plugins/formcraft/file-upload/server/content/files/161002375a326c---5003360824.pdfIn PDF document text
    • http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135d7e27ba49---4539773510.pdfIn PDF document text
    • http://ventmetal.ru/userfiles/files/pezekekozowolow.pdfIn PDF document text
    • http://growlink.biz/userfiles/file/60918842445.pdfIn PDF document text
    • http://www.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d47f581b6e5---binepame.pdfIn PDF document text
    • https://www.myosiaffiliate.com/199trust/img/file/30681638726.pdfIn PDF document text
    • https://laxmigrouppune.com/wp-content/plugins/super-forms/uploads/php/files/9161def72379c579312c0cff6568cc5f/36442604565.pdfIn PDF document text
    • https://celebicatering.com/upload/ckfinder/files/95737998270.pdfIn PDF document text
    • http://thanhlamresort.vn/wp-content/plugins/formcraft/file-upload/server/content/files/160a1cec41b1a4---67931649474.pdfIn PDF document text
    • https://webmodeli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f83f55aafb7---sakemaxukefaluse.pdfIn PDF document text
    • http://vina2002.com/uploads/files/japum.pdfIn PDF document text
    • http://hoilhpnqbthanh.com/upload/file/61577618660.pdfIn PDF document text
    • http://acpiindia.com/userfiles/file/93920237061.pdfIn PDF document text
    • https://acavacecio.it/userfiles/files/26448880856.pdfIn PDF document text
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/i2vnps864rn2v5n383doj31g6k/86065992299.pdfIn PDF document text
    • http://makingthegradetexas.com/clients/d/d4/d4716c73f098ea79da165a2194b6736a/File/xuxuregukini.pdfIn PDF document text
    • http://linuxnewyork.com/draft/media/29047600716.pdfIn PDF document text
    • http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ffa8ab1e3e---bobenedobowerigozomawafad.pdfIn PDF document text
    • http://www.doctor-carpet.com/wp-content/plugins/super-forms/uploads/php/files/nlr0mk4uu7fu012pqosfh27ob6/nowivobisazononedazomup.pdfIn PDF document text
    • http://laulumaja.fi/ckfinder/userfiles/files/90979894565.pdfIn PDF document text
    • https://baxsporthorses.nl/userfiles/file/josep.pdfIn PDF document text
    • http://jumpstart.mobi/ckfinder/userfiles/files/39754807850.pdfIn PDF document text
    • http://fsnmmaterials.com/UPFILE/userfiles/files/biloxevolajifol.pdfIn PDF document text
    • http://barcelonasixtytwo.com/userfiles/file/pipexinebekubanejavak.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=ansul+r+102+manual+pdfPDF 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_off0000e3d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3D9 17736 bytes
SHA-256: f6e85e8cfd140e17ee3b66ae1b5fd238b00a07711c34a2d6bf99a526af8dbd8b
font_01_sfnt_off00011238.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11238 16972 bytes
SHA-256: 96bb11f8d7b9c8650c97fc4b1cb9d0d628f7d31b4d828012b488a676227055a8
font_02_sfnt_off00013e35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E35 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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