Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb7b05502be10983…

MALICIOUS

PDF

132.8 KB Created: 2021-07-20 06:16:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: 35d61e1b1ec071d7a69c427d611af1c8 SHA-1: 5b994461731d2f60acead5ca2b6ae6bc0ca4d193 SHA-256: fb7b05502be1098335059598e73614109bc6bdef62ae029ee806e746b0554380
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links, many pointing to compromised WordPress upload directories or disposable hosting, indicating a link farm designed to direct users to potentially malicious content. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic specifically flags this as a non-clustered link farm on disposable hosting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9752

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://amatnieks.com/pictures/image/kozageruvobodutolovodazuv.pdf In PDF document text
    • http://donateagift.eu/userfiles/file/rubid.pdfIn PDF document text
    • https://www.marvistasales.com/wp-content/plugins/super-forms/uploads/php/files/2949d875b815642306da6a78dc72ba65/zigigawunibuwipabub.pdfIn PDF document text
    • http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa45c1a8b6a---ferodiluxabezoke.pdfIn PDF document text
    • http://guides2alpes.org/uploads/file/87730307186.pdfIn PDF document text
    • https://www.hungarianassociation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c48c7a8db82---38710250479.pdfIn PDF document text
    • https://idea-web.ro/app/webroot/files/userfiles/files/xenepowukaxizokofemibeba.pdfIn PDF document text
    • http://pololanna.com/user_img/files/32227341814.pdfIn PDF document text
    • https://facades-metal.ch/ckfinder/userfiles/files/mekiwakutoboxixebas.pdfIn PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/l0r1k0e80r2j2a18jgrpt6nvt5/23428037000.pdfIn PDF document text
    • https://alatheir.com/atheirwsfiles/file/99663810539.pdfIn PDF document text
    • http://lichnyiybrand.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1609d5f70e1367---gosewilesilawexalanotukez.pdfIn PDF document text
    • https://www.ibyservice.com/wp-content/plugins/super-forms/uploads/php/files/49736922a8a6575e83feca2dad15872d/dafoxaxijavaseduzapawed.pdfIn PDF document text
    • http://wongkungfu.ca/clients/f/f5/f5c316b966f29b3192b3e9e3c5714b3c/File/piradusebapazajewupa.pdfIn PDF document text
    • http://www.ibadirect.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b0e1d9cec6---85631505703.pdfIn PDF document text
    • http://nsfeed.com/_UploadFile/Images/file/vuzidiroputupadexezisav.pdfIn PDF document text
    • https://psychotherapie-dr-albrecht.de/wp-content/plugins/formcraft/file-upload/server/content/files/160878b7e6c73a---bozafupatujilevemokenivi.pdfIn PDF document text
    • https://daluxerealty.com/wp-content/plugins/super-forms/uploads/php/files/cobo9ofnpuju8h1p82h68j2c13/67009890110.pdfIn PDF document text
    • https://brusroom.com/wp-content/plugins/super-forms/uploads/php/files/14696222887a889aaf4d66b18fbfa169/33447541465.pdfIn PDF document text
    • http://khangvietdn.com/uploads/file/4322592874.pdfIn PDF document text
    • http://ajisushionline.com/uploads/files/72007977673.pdfIn PDF document text
    • http://asu.com.vn/wp-content/plugins/super-forms/uploads/php/files/vnf2ur97cerut8utnndqcon26u/52974978597.pdfIn PDF document text
    • http://ozdoby-betonowe21.pl/Upload/file/2267160115.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=formula+for+absolute+refractive+indexPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001856c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1856C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00019d7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19D7E 21920 bytes
SHA-256: 94fc5fc81ec74dec429e1d13e10f13b1ebec289162c91eb1cb14f38b9e4581bc
font_02_sfnt_off0001d6a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D6A2 16084 bytes
SHA-256: 325c5f5cda05429ae92d15c23118ca1b8712e485108c584e1e30b0ff615913b7
font_03_sfnt_off0001ebcf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1EBCF 11024 bytes
SHA-256: a7123da983b50f370210bbe79500bb6a532b2ba3a9c1d967a7ff69db4dc378e5

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