Malicious PDF — malware analysis report

Static analysis result for SHA-256 7089cf44279389cb…

MALICIOUS

PDF

83.4 KB Created: 2021-06-28 18:44:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: aab7463d68065559a85366165dc40b27 SHA-1: 286059ad2894649507b5772801f921406f24e11d SHA-256: 7089cf44279389cb1ed057fa37951f4dfdb2d8973141c6073afe5b7a4e832e24
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm hosted on compromised WordPress sites, suggesting a lure to download further malicious content. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic indicates the document likely provides instructions to decrypt a password-protected archive, a common tactic to bypass gateway scanning. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://quickfix-poland.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b29d5536ae5---79852446920.pdf In PDF document text
    • http://zonweringnederland.com/ckfinder/userfiles/files/fuxazezokex.pdfIn PDF document text
    • https://bharatbiodiesel.com/userfiles/file/96208780011.pdfIn PDF document text
    • https://www.arphplumbing.co.uk/wp-content/plugins/super-forms/uploads/php/files/mf1jjr2dgkek32kgar4rm69s5l/pinesikumuxerepa.pdfIn PDF document text
    • http://www.ddd-iasi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160ade5621163b---vametilimunapal.pdfIn PDF document text
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/ugflv6e9ergv1b4jr625q3e1g2/nezajinojisala.pdfIn PDF document text
    • http://mai-colle.jp/userfiles/file/moruratonenusetamesoj.pdfIn PDF document text
    • http://www.petersmetalstitching.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160a791b241644---44558472939.pdfIn PDF document text
    • https://aliencosmicexpo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088f00b7d2af---77384173166.pdfIn PDF document text
    • https://marksiegeldds.com/wp-content/plugins/super-forms/uploads/php/files/a6e33f210a0f88a9cf4a954d9b30484b/38873770002.pdfIn PDF document text
    • https://diversified-nj.com/wp-content/plugins/super-forms/uploads/php/files/8d9236142b1972190530546ae92ece65/lajefafav.pdfIn PDF document text
    • https://championsforchildren.org/wp-content/plugins/super-forms/uploads/php/files/391861e736418f99e0ff5859b169ea39/sanuzipiwowetepeje.pdfIn PDF document text
    • http://alhouti.com/userfiles/file/60860737866.pdfIn PDF document text
    • http://saovietgroup.com/upload/FCK/file/77732577754.pdfIn PDF document text
    • https://precisionautoandac.com/wp-content/plugins/super-forms/uploads/php/files/aac5ed9d60e06731c0f5313ab9915f0e/71626063038.pdfIn PDF document text
    • http://vitaminyplus.eu/files/file/jowidadekulezaja.pdfIn PDF document text
    • https://celovechurch.org/wp-content/plugins/super-forms/uploads/php/files/ff68a3136d29a90c3f18f2c09bbeb354/taluv.pdfIn PDF document text
    • http://kindervakantieweekdeurne.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b1273e49a27---44144391127.pdfIn PDF document text
    • https://www.ccps.mx/wp-content/plugins/super-forms/uploads/php/files/0e7c2933aeeb68d77cd840bad2b0b8bc/33566330147.pdfIn PDF document text
    • https://baobihungphu.com/media/ftp/file/8485000549.pdfIn PDF document text
    • https://www.colours-of.com/wp-content/plugins/super-forms/uploads/php/files/t34l9c8a4na24b5glm08hnpiv5/96055737298.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/rkki55o2i9d0cicdvsgf0k52v6/3543848398.pdfIn PDF document text
    • https://schreinerheusi.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609fa31452a3c---sanepupomonobesinagelure.pdfIn PDF document text
    • http://www.loockuniformes.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/1608ab4f4cbd84---13586005702.pdfIn PDF document text
    • http://shinies.ru/img/lib/file/99080624101.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=how+to+turn+off+voicemail+to+text+on+iphonePDF 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_off0000e1f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1F7 17272 bytes
SHA-256: fe33aba54c6ef3ee8781b7f9fb19ea9b67e5c589b319f8b7729f8ef59359871a
font_01_sfnt_off00010f0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F0A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012721.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12721 10924 bytes
SHA-256: 7e14e9813d112727348c418feda17344cbc2a9dc9920cbb816ce1c60e0a8184d

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