Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf80c1dfdc49cec3…

MALICIOUS

PDF

73.1 KB Created: 2021-09-06 10:47:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 089917bb6adc8909fa3dbffc4f4ba198 SHA-1: d2c63d6985bce649d63602cc659624552d11c23d SHA-256: bf80c1dfdc49cec380f3417f04f805958871e7a64bca989f7951cce36fc29c5f
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by a machine learning classifier and ClamAV, detecting it as a phishing trojan. It functions as a link farm, directing users to numerous external URLs, many of which are hosted on compromised WordPress sites or disposable domains. These links likely lead to further malicious content or phishing pages, indicating a multi-stage attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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.techsrollout.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085fd53860d8---53490840319.pdf In PDF document text
    • http://phrabat.net/UserFiles/File/79513749347.pdfIn PDF document text
    • https://www.mclarenpress.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d9750bf2203---fovoziwedogova.pdfIn PDF document text
    • http://southport1969.com/clients/861680/File/1685522215.pdfIn PDF document text
    • http://kleinschadenexperte.de/userfiles/file/nakanazidobiz.pdfIn PDF document text
    • https://www.adcgrain.com/wp-content/plugins/super-forms/uploads/php/files/e56b3592c82608fb38c369d42204665f/kutukupo.pdfIn PDF document text
    • https://sieuviet.net/webroot/img/files/bafiwila.pdfIn PDF document text
    • https://www.bevillelecomte.ovh/ckfinder/userfiles/files/xopefoxomifogonotivigu.pdfIn PDF document text
    • http://conhantaoankhanh.com/webroot/img/files/75889368472.pdfIn PDF document text
    • http://eprdel.cz/userfiles/file/86296523755.pdfIn PDF document text
    • http://gotoippc.com/ckfinder/userfiles/files/88565167061.pdfIn PDF document text
    • https://torrentclub.vip/wp-content/plugins/super-forms/uploads/php/files/oatjaqjevjluf9f2e8n9mq329a/topotuvobonufixe.pdfIn PDF document text
    • https://orkhaconstruction.com/wp-content/plugins/super-forms/uploads/php/files/sja76bllivg065p97ovisol07v/vonunikili.pdfIn PDF document text
    • https://masterpieces-mallorca.com/wp-content/plugins/super-forms/uploads/php/files/09fbe9f9573aa8dbcc0ad26493a7d5cd/lofafisusugamakinaxefatag.pdfIn PDF document text
    • https://elpmarketing.ca/wp-content/plugins/super-forms/uploads/php/files/15a0a376c792cbc369d17f8d1dc8a7ce/jobanamuwojirosodixuvuku.pdfIn PDF document text
    • http://kunjipsc.com/uploads/files/gagigotumer.pdfIn PDF document text
    • http://cmepta.com/clients/7/74/74ea2f63c40943e6497cbf70acaf7c81/File/95012575020.pdfIn PDF document text
    • http://cgpharma.in/cote_dor_import/admin/ckfinder/userfiles/files/xuzutalugosi.pdfIn PDF document text
    • http://lightningriskassessment.com/ci/userfiles/files/ninasigokizolalokolaza.pdfIn PDF document text
    • https://drinkpoint.com/uploads/files/giriwizoramixawa.pdfIn PDF document text
    • http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086784f99aba---bujetabu.pdfIn PDF document text
    • http://brodart01.com/wp-content/plugins/super-forms/uploads/php/files/72315d9hsbkqmgk8s7b9k3q06r/48243036197.pdfIn PDF document text
    • http://gentlemensquartersbarbershop.com/wp-content/plugins/super-forms/uploads/php/files/5d1d4209a056650b75d92415be9d9c0f/tazevanetowugidadizo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=chartered+accountant+entrance+exam+question+papers+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_off0000b9d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB9D3 16700 bytes
SHA-256: 23f430b8fe62f9fce06c5dd76f9102f8cc27e417e5618522a82ca40ed7fe73d7
font_01_sfnt_off0000e442.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE442 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fc59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC59 11220 bytes
SHA-256: f1fe0977daf38277e4079ec9770decd29d78fcbc9d73ab5735a3fc8e1677df66

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