Malicious PDF — malware analysis report

Static analysis result for SHA-256 975e8ce0f5a98010…

MALICIOUS

PDF

90.2 KB Created: 2021-06-27 08:17:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: ba53098d3f09096774531d13c7f25976 SHA-1: 7d2fdd20d7ff998e9c88cb9a1bdfec4fd104c86c SHA-256: 975e8ce0f5a980101f94024c587029177a5e2240f1fd0971ecd048c87064bcf5
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple compromised WordPress upload directories. These links are likely used to host phishing pages or further malware payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9812

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 http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608cf33d60035---telaxufarawobetabigeru.pdf In PDF document text
    • http://atomiccm.com/userfiles/files/18679654057.pdfIn PDF document text
    • https://prsnashville.com/wp-content/plugins/super-forms/uploads/php/files/4a419defccee697a36a7f255f05d54b5/7911431864.pdfIn PDF document text
    • https://mrmobilewebsite.agency/wp-content/plugins/super-forms/uploads/php/files/5acbe99b918ecd23c95d6060a9759be0/wovaperagupagamigopof.pdfIn PDF document text
    • http://www.kliningstroy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160b8bacda7a59---xotekufakibadevonevora.pdfIn PDF document text
    • https://www.bluegreenshouseboats.in/wp-content/plugins/formcraft/file-upload/server/content/files/1609697ae40b31---57689606047.pdfIn PDF document text
    • http://xn--pr3b03lcdvwu9dpynqkc.com/DATA/file/20210627091031.pdfIn PDF document text
    • http://zulassungsservice4you.de/bilder/file/61984444515.pdfIn PDF document text
    • https://gtsonline.nl/wp-content/plugins/super-forms/uploads/php/files/6irbsve6j8ndfqfgp6n7eidnbp/tamudirol.pdfIn PDF document text
    • http://capri.lt/userfiles/files/zoxikapuxorajitufanez.pdfIn PDF document text
    • https://ropaalmayoreo.com/images/userfiles/file/zudef.pdfIn PDF document text
    • http://osc-pribor.ru/products_pictures/file/gawuw.pdfIn PDF document text
    • http://ophtalmic-overnight.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160bf2c2e6f28d---95742612390.pdfIn PDF document text
    • https://boucherienabli.com/uploads/FCK_files/file/foxodurodelaz.pdfIn PDF document text
    • http://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081c1f1e8881---velutep.pdfIn PDF document text
    • https://www.dyna-tech.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160d5cdc079df2---85986619809.pdfIn PDF document text
    • http://penoplex24.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160c9b06f46d9c---73267149337.pdfIn PDF document text
    • https://genesisbehaviorcenter.com/wp-content/plugins/super-forms/uploads/php/files/c38d74b63e26b2f577a7b91c8ac0c470/kamozudenitevofale.pdfIn PDF document text
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d639e53f4f0---regijudejupenuj.pdfIn PDF document text
    • http://atol-res.pl/uploads/file/ronabozivumokip.pdfIn PDF document text
    • http://acetuitioncentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16080b59c8bace---fatadupabufakivuvigewes.pdfIn PDF document text
    • http://ehomeforeclosure.org/images/file/34847307396.pdfIn PDF document text
    • https://www.abaco-engineering.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a52e8772fa4---95641760736.pdfIn PDF document text
    • http://americasbestmanassas.com/uploads/files/63642709014.pdfIn PDF document text
    • http://ndt-tl.ru/upload/file/8212911856.pdfIn PDF document text
    • https://www.sidertest.it/wp-content/plugins/formcraft/file-upload/server/content/files/16096444d1e860---rasuwagarutipizimiguv.pdfIn PDF document text
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b6c7928b476---11485054692.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=the+suffixes+of+nounsPDF 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_off000100dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100DD 10072 bytes
SHA-256: cfa6ecfbf5bbbb8881eedec668811758576d7c2b8afd25e68db0e24bea9bba5b
font_01_sfnt_off0001173d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1173D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012f4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F4F 16884 bytes
SHA-256: ff664bf0facac7f9c6dfdf9eff523f919075f5b1414814ecc18fe28261529528