Malicious PDF — malware analysis report

Static analysis result for SHA-256 1fdd77096db34542…

MALICIOUS

PDF

84.9 KB Created: 2021-09-08 04:17:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 371d74a7f29417b7129c7071494ab286 SHA-1: 187c453d6ce0c0510e553720567589661a559f2b SHA-256: 1fdd77096db34542ba1b42f8128f6d8bd0beab12e991a3b12a3ca70c4560ef13
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, with numerous embedded URLs pointing to potentially compromised websites, likely to host further malicious content or phishing pages. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggests a deliberate attempt to create a network of links for malicious purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://debsluxe.com/clients/1/17/174397649ed9f07baa8f9d9f48c72a4d/File/93175059009.pdf In PDF document text
    • http://tuzvedo.hu/elemek/file/gewed.pdfIn PDF document text
    • http://sarljarry.fr/userfiles/file/66348553190.pdfIn PDF document text
    • http://cabini.it/userfiles/files/titubiw.pdfIn PDF document text
    • https://sunarchegypt.com/userfiles/file/73716392787.pdfIn PDF document text
    • http://aucoindeshalles.fr/menu/file/bawawajofasagixoronifuli.pdfIn PDF document text
    • http://www.1atlanticfunding.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ccb1688f807---jemujenuzonarojizulomu.pdfIn PDF document text
    • https://ebooksweb.net/files/file/6174670125.pdfIn PDF document text
    • http://www.oschouston.com/osc/wp-content/plugins/formcraft/file-upload/server/content/files/1606e44672c29c---33918083166.pdfIn PDF document text
    • http://countrysquirefoods.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095c67dd55cf---mebibo.pdfIn PDF document text
    • https://nabil-doukali.com/userfiles/file/56535107265.pdfIn PDF document text
    • https://bamfieldrental.com/userfiles/file/vinumipulop.pdfIn PDF document text
    • http://omatsuri.kr/data/userfiles/files/saxilodufudibunuzeke.pdfIn PDF document text
    • https://tgvl.in/uploads/fck/files/53927675544.pdfIn PDF document text
    • http://pileshoppen.dk/userfiles/file/lizawajabewofotabe.pdfIn PDF document text
    • http://ovartec.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a30d04086b---zovevesevumobuvofulexa.pdfIn PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/53b641b50f1addac87043bc329c9b7f6/31197220376.pdfIn PDF document text
    • https://imotrading.com/images/userfiles/7038999271.pdfIn PDF document text
    • http://clubcrudupsonoma.com/clients/1/14/14cf715f5cd05ddba197ceaa5938d7d5/File/1776429776.pdfIn PDF document text
    • https://cffcommunications.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/160f4a539e4e45---tevogipalen.pdfIn PDF document text
    • https://esteticarcare.com/wp-content/plugins/super-forms/uploads/php/files/5fae8d2967370de363734c7933a75937/80467768965.pdfIn PDF document text
    • https://www.caesarstravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098475e0bf9e---78298338008.pdfIn PDF document text
    • https://snoman.mb.ca/ckfinder/userfiles/files/basemizefinur.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=german+short+stories+for+beginners+pdf+freePDF 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_off0000e405.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE405 18980 bytes
SHA-256: 2eaaaf55a283621b014b08168f718c207250f1df92a2f902d73c553d0bf61193
font_01_sfnt_off000114e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114E1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012cf8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CF8 11080 bytes
SHA-256: 184dce0221cbfd77eea440935b4f86ac11f54bc9f285c1c62980d089565dcc90

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