Malicious PDF — malware analysis report

Static analysis result for SHA-256 f24d792fee9737d1…

MALICIOUS

PDF

79.7 KB Created: 2021-07-03 21:15:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 356e3edb84882d90785846e553471a8e SHA-1: 6e8d11908326c4e1a082abd98a7679a8a15bb7e0 SHA-256: f24d792fee9737d15966b3bc84d8a02a6e987ff93a5357c27fe8bb02d4cf9fd3
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains numerous links, many pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. No scripts were extracted, but the presence of many external URIs indicates a strong intent to lead the user to external, potentially harmful, resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

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://alphabodysupplements.com/newerac2c/userfiles/file/nozekutavevebani.pdf In PDF document text
    • http://musiconthebay.org/clients/2/26/269dd5bc96e197da989a8dccc71442af/File/zinajamikazebimotabadukax.pdfIn PDF document text
    • https://marciasmithconsulting.com/wp-content/plugins/super-forms/uploads/php/files/536b066375b0e2f588e1f0e0e5fa03c8/rukorija.pdfIn PDF document text
    • https://winston-woodward.com/wp-content/plugins/super-forms/uploads/php/files/ad1554743595b56c4dd68ece1db539c6/kuwewuxejumazonorekuzoj.pdfIn PDF document text
    • https://akarchlight.com/wp-content/plugins/super-forms/uploads/php/files/9181e309ca1b9c9cb8ea3d4aa7e799ff/9252179699.pdfIn PDF document text
    • http://www.zav-mito.si/wp-content/plugins/formcraft/file-upload/server/content/files/160b2729008d05---jotilaziwovaxuvunufam.pdfIn PDF document text
    • http://gorisum.net/fckeditor/upload_file/file/remasorugapifamefoke.pdfIn PDF document text
    • https://driftwoodcc.com/userfiles/files/mazuremadakuxiropobobawo.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/omdhov9r4uibet059p8gipeap3/26969536692.pdfIn PDF document text
    • http://www.kzhep.in.ua/wp-content/plugins/super-forms/uploads/php/files/f026q531ja278n5f382pq25gd6/kaxesazajurugofozuvotu.pdfIn PDF document text
    • https://borderpak.com/wp-content/plugins/super-forms/uploads/php/files/da1bfa1e6e7074fdbb6e44101c538ca3/vuloxak.pdfIn PDF document text
    • http://philcoastal.net/ckfinder/userfiles/files/ganeloganosomomaz.pdfIn PDF document text
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/bfc07f4cad87858fa574d87e71c34c46/78869773705.pdfIn PDF document text
    • http://elonsummerstorage.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607294de42cab---91866282781.pdfIn PDF document text
    • http://bumsnab.ru/uploads/files/54856739940.pdfIn PDF document text
    • http://canevinclassof70.com/clients/6/6b/6b8b8ee0d314e59372afbcb75100d768/File/95311129601.pdfIn PDF document text
    • http://autosoftware.company/autoresponders_images/files/zexutabowida.pdfIn PDF document text
    • https://www.sidertest.it/wp-content/plugins/formcraft/file-upload/server/content/files/16091311d09e4e---66665795967.pdfIn PDF document text
    • https://avenirpourtous.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16070157b294f7---mobezujomobizalaguguxivi.pdfIn PDF document text
    • http://krindustria.com.br/site/wp-content/plugins/formcraft/file-upload/server/content/files/160d2b521403b2---31274796548.pdfIn PDF document text
    • https://goldenparadisestsimons.com/wp-content/plugins/super-forms/uploads/php/files/dd429736a245bf98826df712cecabea2/63723763552.pdfIn PDF document text
    • http://modnyi-buket.ru/uploads/files/18483963353.pdfIn PDF document text
    • http://global-poseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fd10049bc4---51891833791.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090f58e13d75---zegimesiseg.pdfIn PDF document text
    • http://dralituncer.net/userfiles/file/37307238348.pdfIn PDF document text
    • https://www.brightfieldbusinesshub.co.uk/wp-content/plugins/super-forms/uploads/php/files/8uq2gcfle2a1rq1i5v2mk8ksm0/jisakonokevobozonokazida.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=2nd+year+math+ex+2.5+notesPDF 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_off0000d3bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3BD 10812 bytes
SHA-256: 8bf49e3f00806474d29ca8b643e7b1f13b2832e903bba65baba44672ce142616
font_01_sfnt_off0000eca2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECA2 17012 bytes
SHA-256: e4230dac9f1b681713864b1c92aa4ebde6cbec93949c3357aad81157fc82bdf5
font_02_sfnt_off00011936.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11936 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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