Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c0970781dbd3d58…

MALICIOUS

PDF

82.7 KB Created: 2021-09-08 04:05:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 09c415798cb3bfdf209e6da6c511bcbd SHA-1: 2a3f91a7e28e7eff04e1c54faab776002e6e10b0 SHA-256: 7c0970781dbd3d5830f190dbcf42e54c8e24e2cebda4cc807b253e31db0777d2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many pointing to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious document delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://krisoc.ru/uplcv?utm_term=tejido+adiposo+y+obesidad+pdf PDF link annotation
    • http://www.hmh.sk/files/articles/file/lapopenufelabikufalomomez.pdfIn PDF document text
    • https://www.tai.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160826f7cd09a1---61487157432.pdfIn PDF document text
    • http://stagnesreunion.com/clients/e/ed/ed16748122b3ff8ec97113314e0446c4/File/zugiwojam.pdfIn PDF document text
    • https://srmhospitalities.com/images/bulk_images/files/gofajolubajevexizexomimug.pdfIn PDF document text
    • http://xn--pr3b03lcdvwu9dpynqkc.com/DATA/file/20210705121006.pdfIn PDF document text
    • https://majorsagilekvaros.hu/uploads/file/roxugar.pdfIn PDF document text
    • https://annjulieskarpmo.com/userfiles/file/kopit.pdfIn PDF document text
    • http://www.phonefixcomo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f39fc6b841a---31076975151.pdfIn PDF document text
    • https://boldvision.tv/wp-content/plugins/formcraft/file-upload/server/content/files/1611007c63582a---bonovowasowumuji.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087818029fd4---88382565226.pdfIn PDF document text
    • https://muguet.fr/sites/default/files/file/51156890904.pdfIn PDF document text
    • http://bebelino.ru/userfiles/file/litawapiwixiwivelamofija.pdfIn PDF document text
    • http://roomyab.ir/basefile/roomyabir/files/93988658753.pdfIn PDF document text
    • http://frederickfollows.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16080592d0b023---rezobedugavemakeg.pdfIn PDF document text
    • https://area34.info/wp-content/plugins/super-forms/uploads/php/files/3j4670icl47s8eior0qu393qj7/23965479309.pdfIn PDF document text
    • http://sinara.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607db9badf6e3---61984838255.pdfIn PDF document text
    • https://mystruggle.uk/indigo/ckfinder/userfiles/files/33969962425.pdfIn PDF document text
    • http://medicalproduct.hu/images/files/pezumifasegagekakazokopa.pdfIn PDF document text
    • https://neavocats.com/wp-content/plugins/super-forms/uploads/php/files/5decb002b5240c3fa91d8c7560c4338c/todugitidobaxotu.pdfIn PDF document text
    • http://shtaket46.ru/page_edit/_samples/userfiles/files/94263768581.pdfIn PDF document text
    • https://abctranslink.com/ckfinder/userfiles/files/wavalewide.pdfIn PDF document text
    • http://kondicionery-fryazino.ru/upload_picture/file/12999516613.pdfIn PDF document text
    • https://mediaget.com/userfiles/files/57957557891.pdfIn PDF document text
    • 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_off0000db14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB14 19768 bytes
SHA-256: 93fbcce506ff4e348c536b14a1d576b12edac865f7da909beecaa41f7a826ed1
font_01_sfnt_off00010d56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D56 10492 bytes
SHA-256: bbe8b970ba945a96c1fe4681653ebc12aa44f23ec55f7015b082439f8192d620
font_02_sfnt_off0001250e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1250E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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