Malicious PDF — malware analysis report

Static analysis result for SHA-256 99d2344b3c9258fe…

MALICIOUS

PDF

87.0 KB Created: 2021-09-10 23:45:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 86b55daf27aa456ff649aa66b53dd62c SHA-1: 885c95932b1d2b583ecafbf0d7920c4b680daa75 SHA-256: 99d2344b3c9258fed383b5899a2c41c9a494a8e0e2f33b7e6fa24e3ec73befaa
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, containing numerous URLs that point to potentially compromised WordPress sites. These links likely serve to redirect users to malicious content or downloads, a common tactic for distributing malware or conducting phishing attacks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://qamarapps.com/wp-content/plugins/formcraft/file-upload/server/content/files/161372b70e8078---ludinefejuzifinemawavop.pdf In PDF document text
    • http://cuspsurgeons.com/userfiles/file/6234931354.pdfIn PDF document text
    • http://aweibel.com/Photo/file/94581290927.pdfIn PDF document text
    • http://honderhotel.com/UploadFiles/FCKeditor/20210906191643.pdfIn PDF document text
    • http://abwingstop.com/uploads/files/53274794939.pdfIn PDF document text
    • http://mzch.pl/userfiles/file/verarerelupogebuwadedit.pdfIn PDF document text
    • http://deborahmayerlawoffices.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/tinelediwejujazijelit.pdfIn PDF document text
    • http://servis-hradec.cz/files/file/pobetanewegezunemej.pdfIn PDF document text
    • https://jnnjhansi.com/userfiles/file/ludajajipoworalebupi.pdfIn PDF document text
    • http://elvirajogsi.hu/ckfinder/userfiles/files/dawujukotudijisemu.pdfIn PDF document text
    • https://aashianarealty.com/file/forubimega.pdfIn PDF document text
    • https://cremeconferences.com/wp-content/plugins/super-forms/uploads/php/files/6d15af8299b5b648542dcd5ff0fd02ef/xifanosixidusanif.pdfIn PDF document text
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16130940c721b2---30024627575.pdfIn PDF document text
    • https://www.akilciilacdernegi.com/ckfinder/userfiles/files/rajixozama.pdfIn PDF document text
    • https://egyseg.eu/ckfinder/userfiles/files/negatepifakufifonefabij.pdfIn PDF document text
    • http://homokkepek.hu/editor_up/81992582254.pdfIn PDF document text
    • http://canavesiobruno-architetti.it/userfiles/files/74106349126.pdfIn PDF document text
    • http://tcsm62.org/uploads/news/file/lixug.pdfIn PDF document text
    • http://laduses.nl/image/file/joverarejoxatexiwedexo.pdfIn PDF document text
    • http://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132fd9e022e3---durowavigebiz.pdfIn PDF document text
    • http://opalbiosciences.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130727e0aefc---12613252603.pdfIn PDF document text
    • http://roberlo.cz/www/files/file/72475030442.pdfIn PDF document text
    • http://tootingtaxi.com/survey/userfiles/files/zumekepolifo.pdfIn PDF document text
    • http://vdavloeren.be/userfiles/files/40469653670.pdfIn PDF document text
    • https://fancybox.pamlskovnik.cz/ckfinder/userfiles/files/99404097180.pdfIn PDF document text
    • http://abbwingslynnhaven.com/uploads/files/sosufonaker.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=hey+band+android+appPDF 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_off0000eeb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEB5 18920 bytes
SHA-256: 6eb375a044b60ee7cb7accfbd0897253b8d28203d92edf938d23ca9c00cf629a
font_01_sfnt_off00011f55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F55 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001376c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1376C 10316 bytes
SHA-256: 646cd483385872707015648f9e0a5748a2c6c178b67591141eb0ee675f152b80

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