Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b4677843e6c4e84…

MALICIOUS

PDF

100.5 KB Created: 2021-08-17 22:15:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 58861623f95458eef9dc64d0867cda0c SHA-1: 8c8850e94bb7de82a6a92b25416a84631bfd03f6 SHA-256: 8b4677843e6c4e8472589d8a60e90afa576e87d3e8d7216a4ef6b2217e5c93ba
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to multiple domains, many of which appear to be compromised or disposable hosting. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic indicates the document likely instructs the user to download a password-protected archive, a common tactic to bypass gateway scanning. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9916

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 https://responsible-tourism-alliance.com/content_file/files/takulenozuvupi.pdf In PDF document text
    • https://www.taxiserviceh24.com/wp-content/plugins/formcraft/file-upload/server/content/files/160db738d18f38---refavizelixovinuwofe.pdfIn PDF document text
    • https://siyata.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1608446c15312a---fotikafagovalulifij.pdfIn PDF document text
    • http://www.kzhep.in.ua/wp-content/plugins/super-forms/uploads/php/files/62a0rs3q3ji24ag5m0p1292g57/torobovekojemegojev.pdfIn PDF document text
    • http://dodici12.ru/wp-content/plugins/super-forms/uploads/php/files/761ijkvdj8qela3ukmua73b5n3/5699292278.pdfIn PDF document text
    • http://ventmetal.ru/userfiles/files/pezekekozowolow.pdfIn PDF document text
    • https://chetanaus.org/bheru/uploadfiles/file/vidizaxejeru.pdfIn PDF document text
    • https://www.sudburyhighspeedinternet.ca/wp-content/plugins/super-forms/uploads/php/files/fc42d831552e0f6ce400fab6dc340f74/gamabatademofinoz.pdfIn PDF document text
    • http://www.commandinglife.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073b6b362328---67117200991.pdfIn PDF document text
    • https://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/16070ce4201977---99848602458.pdfIn PDF document text
    • https://www.sir.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160d235093eec8---24265845471.pdfIn PDF document text
    • https://xn----8sbaavnccwq4am.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/a63b1f4ee0f852fd7312bc4418c1b70f/89331351367.pdfIn PDF document text
    • https://ontime-taxi.kg/wp-content/plugins/super-forms/uploads/php/files/f568af6f7d7860166e1cd04f87fe9c72/56707811559.pdfIn PDF document text
    • http://stopasbestos.ca/wp-content/plugins/formcraft/file-upload/server/content/files/161096ce7e1236---68824278071.pdfIn PDF document text
    • http://www.pibmg.com.br/ckfinder/userfiles/files/files/gefim.pdfIn PDF document text
    • https://angkortaxiservice.com/userfiles/file/93087008183.pdfIn PDF document text
    • http://www.peplex.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607cfa60b10e4---43185155836.pdfIn PDF document text
    • http://111-orte.de/testarea/cwsCMSlight/media/files/loxidofuzekevaz.pdfIn PDF document text
    • http://swancentive.com/cote_dor_import/admin/ckfinder/userfiles/files/delilewasudefomepureviv.pdfIn PDF document text
    • http://divorcefinance.nl/uploads//file/38800749486.pdfIn PDF document text
    • http://bakoca.hu/files/file/74214973662.pdfIn PDF document text
    • https://www.oneirishrover.com/wp-content/plugins/super-forms/uploads/php/files/f3645b34a0f5eba397666e329086f6fd/96853252767.pdfIn PDF document text
    • http://altelaw.com/uploads/image/file/dutisewepoparujin.pdfIn PDF document text
    • https://malimbe.africa/wp-content/plugins/super-forms/uploads/php/files/79c12648f3911a43fc620bb30133d7b8/54555075938.pdfIn PDF document text
    • https://benchmarktransitions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7f4dab75f9---pidirajewujojaxuradugosob.pdfIn PDF document text
    • http://medob.org/SITE/files/editor/file/55458379711.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=alexa+escape+room+garage+toolbox+code+answerPDF 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_off0001222d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1222D 18096 bytes
SHA-256: d0fe2ba417d164fe45305eea2c662f9871ddd75d7866855fbc30c062e37bf067
font_01_sfnt_off00015164.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15164 11072 bytes
SHA-256: 9f238b08195d1e91caca47135d78105adfc6db1ed36614866ea80a4e2218a89b
font_02_sfnt_off00016ae6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16AE6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.