Malicious PDF — malware analysis report

Static analysis result for SHA-256 1bf04d6bf19138c8…

MALICIOUS

PDF

81.5 KB Created: 2021-09-11 05:51:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 7f7f072fc7f849a626d4e3d9a444cda7 SHA-1: 280edbc88f2eaaefc7090601350dd2b7b07bb6c1 SHA-256: 1bf04d6bf19138c8419e9b0c339999f25fdbe1b90554d685860b079b6f421903
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable domains, indicating a link farm designed to lure users to potentially malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9833

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://chukysovin.com/img-svc/files/69861962114.pdf In PDF document text
    • http://rrarental.org/upload/file/83681537037.pdfIn PDF document text
    • http://quetthe.com/upload/files/vijan.pdfIn PDF document text
    • https://pristineleather.com/userfiles/file/77694462982.pdfIn PDF document text
    • https://iieng.org/editor/ckfinder/userfiles/files/pebanuzitolaz.pdfIn PDF document text
    • https://divinenine.net/userfiles/file/xajorepub.pdfIn PDF document text
    • http://esoftland.com/userfiles/file/sinajojunoxitil.pdfIn PDF document text
    • https://sandipkumardutta.com/ckfinder/userfiles/files/10338607156.pdfIn PDF document text
    • https://ardiinerkh.mn/uploads/userfiles/files/3747347366.pdfIn PDF document text
    • http://rallyteamwalraven.nl/file/mudimofezarotawuketipa.pdfIn PDF document text
    • https://hsse.hssanesteban.cl/files/xudowijiladelebazuxokefu.pdfIn PDF document text
    • http://www.realisthotel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131639c72c25---noxobonemogatifedosa.pdfIn PDF document text
    • http://chemtron-vostok.ru/media/file/69769811815.pdfIn PDF document text
    • https://ipssecurityconsultants.com/ckfinder/userfiles/files/sugap.pdfIn PDF document text
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/161389733eb9f3---nuvinexezi.pdfIn PDF document text
    • https://gcr.goldcrownresort.com/magazine_files/files/rawabuwixifipu.pdfIn PDF document text
    • http://ubytovani-budejovice.cz/picture/vtextu/file/xezavizufedodanafomowuxup.pdfIn PDF document text
    • http://reklamavysocina.cz/UserFiles/File/66180157436.pdfIn PDF document text
    • http://remontnoedelo.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1613925a9e44b9---wuwivadixidaja.pdfIn PDF document text
    • http://bukvoznaika.ru/ckfinder/userfiles/files/gopaliz.pdfIn PDF document text
    • https://areopag.ru/sites/default/files/uploads/solusaturuligigupa.pdfIn PDF document text
    • https://asiatravel.kg/wp-content/plugins/super-forms/uploads/php/files/293d23e7f3a40d0d5dba3384c3d2d2d6/mojex.pdfIn PDF document text
    • http://thomas-zigon.de/images/file/funozowaka.pdfIn PDF document text
    • https://minjar.mebel18.com/uploads/files/ketipirewo.pdfIn PDF document text
    • http://lutechmed.com/Images_upload/files/wevafarusemibomewi.pdfIn PDF document text
    • http://abw10thstreetne.com/uploads/files/15798093075.pdfIn PDF document text
    • https://glamweddingdesign.com/userfiles/file/texelar.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=how+to+download+apps+directly+in+sd+card+from+play+storePDF 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_off0000d8f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8F5 10972 bytes
SHA-256: 297039ba1c227b5d2ab5e45553cb48ff415bbb1b6c1ab3df3554f9176ac276f5
font_01_sfnt_off0000f278.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF278 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010a8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A8A 17656 bytes
SHA-256: 884a080f1ed6b8414638111879565f5605318e2d53e7e0db666227dd8818468f

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