Malicious PDF — malware analysis report

Static analysis result for SHA-256 94808a8639cb3b5f…

MALICIOUS

PDF

85.9 KB Created: 2021-09-12 15:37:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 49ba5c5274f5883a375cba4f12652404 SHA-1: 8df5574dd63b19a3d03042e8b4e76609352e498f SHA-256: 94808a8639cb3b5f1cddfce12209540ea2c85c3f530c659f8f6b4c2e0772c7fd
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable domains, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the nature of the URLs and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic point towards a phishing or malware distribution campaign, likely initiated via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://coretry.ru/uplcv?utm_term=ard+mediathek+download+android PDF link annotation
    • https://hijaustabilo.com/contents/files/memijijepamikudof.pdfIn PDF document text
    • https://madspot.dk/ckfinder/userfiles/files/55468112243.pdfIn PDF document text
    • https://peterdegendt.be/file/retexanobepin.pdfIn PDF document text
    • http://morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/161388e14131c7---newugamelusaxon.pdfIn PDF document text
    • http://mdtrend.hu/files/file/50842000047.pdfIn PDF document text
    • http://briquettemachinery.com/d/files/83031137055.pdfIn PDF document text
    • http://congtrinhnhaviet.vn/upload/files/89573137296.pdfIn PDF document text
    • http://veewood.com/file_media/file_image/file/79279434401.pdfIn PDF document text
    • https://terracell.pt/images/file/69396840492.pdfIn PDF document text
    • http://witnesstherealist.com/wp-content/plugins/super-forms/uploads/php/files/f48156cbc596c37c6a68e7f2ddbb5675/94727439077.pdfIn PDF document text
    • https://nazrabilisim.com/calisma2/files/uploads/juvorororuvotutaxelis.pdfIn PDF document text
    • http://ux-school.ru/files/files/43481916016.pdfIn PDF document text
    • http://essentielles-theater.de/UserFiles/File/rowiwumujinod.pdfIn PDF document text
    • http://moyamoya.center/images/hand_uploaded/files/46502162188.pdfIn PDF document text
    • https://readxyz.com/wp-content/plugins/super-forms/uploads/php/files/b7a0ffc4172437d6966033a525721c8c/runamuwifasuful.pdfIn PDF document text
    • https://totalsewa.com/userfiles/file/paberabositoxunawif.pdfIn PDF document text
    • https://stomatoloska-ordinacija-rijeka.com/files/puxidikofewodof.pdfIn PDF document text
    • http://ty-int.com/files/files/8294218019.pdfIn PDF document text
    • http://jshanwoo.com/ckfinder/userfiles/files/wulomoluzidezerobe.pdfIn PDF document text
    • http://www.grundys.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/161356263ee39e---9844368630.pdfIn PDF document text
    • http://silverspringabw.com/uploads/files/bizurusupegidetofuko.pdfIn PDF document text
    • https://parvazyab.com/basefile/api203/files/wamepiwumopexib.pdfIn PDF document text
    • http://www.studiolegalefusimorelli.com/wp-content/plugins/formcraft/file-upload/server/content/files/161340f2622ec8---sotetogatanenog.pdfIn PDF document text
    • http://smsgurugram.com/miet/assets/files/budavapulapusenosofoli.pdfIn PDF document text
    • http://cluster006.ovh.net/~greeters/be/ckfinder/userfiles/files/tefelativaromo.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_off0000e997.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE997 10504 bytes
SHA-256: f5a787087f0c3807b620af2b0bd8ac67d7803b5e83af5720577f2a902d5726af
font_01_sfnt_off00010151.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10151 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011963.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11963 18484 bytes
SHA-256: 738374bcc2b6622ef49139c2bb7783138379a8a73a793ac780ac8773d4fc3288

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