Malicious PDF — malware analysis report

Static analysis result for SHA-256 34f01551039edebd…

MALICIOUS

PDF

80.8 KB Created: 2021-07-15 10:29:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 5063cf0a8151f5c60ac56722f0817419 SHA-1: df2d053839e81ddc10ae136268b3c58907cf33cd SHA-256: 34f01551039edebdf34363fad69d4f4533fa27f9c2f67aa627b078ab04c15fb1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution attempt. It contains numerous links to external PDF files hosted on compromised websites, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs further supports the attack pattern of directing users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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 https://www.paparazzirestaurant.com.au/wp-content/plugins/super-forms/uploads/php/files/76245e02c624dfc81b30e6fb1b0f53bf/80917628821.pdf In PDF document text
    • http://eaeocs.com/clients/c/c7/c75ed17bfa54634cfc1039f1b599a7e7/File/kapenuxukelapowodilowab.pdfIn PDF document text
    • http://cityhelps.org/clients/6/61/61afa7a028a8e04f14432b0fece6f2b0/File/98377555813.pdfIn PDF document text
    • http://somersetcountybar.org/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/sanabetoxi.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/55518c636f01c2f89d53ef097c5d45a8/kuxoparemoxoxipabibunaw.pdfIn PDF document text
    • https://tepihtrava.rs//files/24528547713.pdfIn PDF document text
    • http://ray-king67reunion.com/clients/41562/File/13676145473.pdfIn PDF document text
    • http://douzonebnf.com/upload/file///wawapibiselugidexokub.pdfIn PDF document text
    • https://balajitutorial.com/admin/userfiles/file/74377135562.pdfIn PDF document text
    • http://wjvanderheidedienstverlening.nl/uploads/file/jixutupedigike.pdfIn PDF document text
    • http://ciccioinpentola.com/userfiles/files/79966572914.pdfIn PDF document text
    • http://nuestratierrapremios.com/campannas/file/73982863890.pdfIn PDF document text
    • https://www.adcgrain.com/wp-content/plugins/super-forms/uploads/php/files/484703fafe1461e84c7e3c4e4539bb7d/34498339166.pdfIn PDF document text
    • https://worldkelo.com/wp-content/plugins/super-forms/uploads/php/files/9ccd1e0a3b7bf3afff8aa38806eb74c9/tororejoposuxipem.pdfIn PDF document text
    • https://securitydm.rs/slicice/file/pafetovebikuvufizozusaja.pdfIn PDF document text
    • https://elesud.it/img_pagine/file/latonaxixepulobeworobo.pdfIn PDF document text
    • https://inchirierielicopter.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a65c5a2add6---jewudomaxamo.pdfIn PDF document text
    • https://artofsurfing.com/preview/ckfinder/userfiles/files/wodukofepapezenu.pdfIn PDF document text
    • https://chiataiec.com/userfiles/Proj_Name//files/84226008714.pdfIn PDF document text
    • http://turnwealthy.com/ckfinder/userfiles/files/rigobenasonosawowez.pdfIn PDF document text
    • http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c16508d6e65---56494569754.pdfIn PDF document text
    • https://mmszke.hu/files/file/kabupapuxivapukezedu.pdfIn PDF document text
    • https://cafepiolho.com/uploads/assets/56469329073.pdfIn PDF document text
    • http://workprohealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085a87b8c7fe---kegexafit.pdfIn PDF document text
    • http://rufullthrottle.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607427b7e2873---jedikaz.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=uia+1713+fact+findingPDF 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_off0000d9fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9FC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f213.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF213 10368 bytes
SHA-256: 1d3021232c8678205e1b7e4b98d839a526f72329ba870e4cbe0a229f29b56b88
font_02_sfnt_off00010981.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10981 17328 bytes
SHA-256: 98bda687f157c3a3e82b2715b494b4acb3f30b2a772f934044891dadaadab354