Malicious PDF — malware analysis report

Static analysis result for SHA-256 06397ad406cea8e6…

MALICIOUS

PDF

90.4 KB Created: 2021-08-01 07:06:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 14638fa7cbc094bf098505c76a62b748 SHA-1: e35a9645d606eaf8f6682fd2561899e9ea4704fa SHA-256: 06397ad406cea8e665a070551c3a5fb66ac03785bd40c6d244ae8228c98bef4d
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link farm pointing to multiple compromised websites, suggesting an attempt to distribute malicious files. The presence of a 'Download button' heuristic and ClamAV detection as 'Pdf.Phishing.Trojan' further supports a malicious intent. While no scripts were explicitly extracted, the PDF structure and URL patterns are indicative of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://hajnysport.cz/FCK_userfiles/file/11076282271.pdf
    • https://endoaccessories.com/wp-content/plugins/super-forms/uploads/php/files/0mta8cbt0lejr71dqp5uds6bl6/lomoxogi.pdf
    • https://www.abaco-engineering.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c29b31e2262---tujokelefukererimofi.pdf
    • http://jshanwoo.com/ckfinder/userfiles/files/jizoreguxebuxunuj.pdf
    • https://vialivonica.eu/userfiles/files/nibuxigok.pdf
    • http://kenzoum.org/home/integrity/public_html/ckfinder/userfiles/files/wofupanopeselak.pdf
    • https://galerieportelouise.be/userfiles/files/60938306390.pdf
    • https://stijsr.com/userfiles/file/75267313452.pdf
    • http://cgt-fo-csc.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160a260fe38883---wexolemazitesoxe.pdf
    • http://ingenermarket.ru/userfiles/37028402172.pdf
    • http://heilpraxis-pankow.de/wp-content/plugins/formcraft/file-upload/server/content/files/16087467635b4c---kedap.pdf
    • https://daaeportrett.no/upload/file/27363143395.pdf
    • https://hondamienbac.vn/userfiles/file/jiwobuwagukutuni.pdf
    • https://www.blackandwhite-salon.com/wp-content/plugins/super-forms/uploads/php/files/24c1c06379e345871bf30dbf7829a827/dutafara.pdf
    • http://folientastaturen.pl/_data/file/1729559316.pdf
    • https://cristiandellavedova.com/wp-content/plugins/super-forms/uploads/php/files/bamujddvhjl1n4p7qs1f0sgeg7/nokuvubuz.pdf
    • https://www.shopveriamici.com/wp-content/plugins/super-forms/uploads/php/files/1ggnlhoiddb2sl89ieinligp9a/luseroluwuneruv.pdf
    • http://limpiasol.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072d42cd64e3---wegovewopixanikilibi.pdf
    • http://slowjamsundays.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f8a953e070---14163862486.pdf
    • https://www.frankreich-ferien.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160ac3bd786a5d---rabozekavozu.pdf
    • http://wenxuezj.com/images/File/56403214656.pdf
    • http://stoewebdesign.no/userfiles/file/pemitupumuw.pdf
    • http://greenhousehotel.vn/uploads/image/files/mafoxata.pdf
    • https://ptkas.com/kingkong/userfiles/files/bigakiwanu.pdf
    • https://portsidestrategies.com/wp-content/plugins/super-forms/uploads/php/files/686c8b97dcb79df6f5d413da09b831e6/93744952368.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=the+boss+baby+full+movie+in+hindi+download+filmywap
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fcf2.bin
c6f8e3d8717aea1377f08fd73827006a58f52ae543a4cdb38c65c9aa3b85b55b
pdf-font-stream PDF embedded font (sfnt) at offset 0xFCF2 11036 bytes
font_01_sfnt_off00011645.bin
e38081e4a5a2d3524813d9ee211ee83d2bbcd021cc70b0367a7ad4e52d1efdbb
pdf-font-stream PDF embedded font (sfnt) at offset 0x11645 16920 bytes
font_02_sfnt_off0001424d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1424D 16792 bytes