Malicious PDF — malware analysis report

Static analysis result for SHA-256 a60be4a592217898…

MALICIOUS

PDF

93.7 KB Created: 2021-08-02 15:50:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: afff4203ef769d9383923df9696781d7 SHA-1: cca98183f0938e77c8c80b9c08325b6a1ef9c304 SHA-256: a60be4a59221789851b9a13f91ef87fec55c437693bdc9e1bc927938c8ce442b
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous external links, many pointing to compromised WordPress sites and disposable domains, indicating a link farm designed to redirect users to potentially malicious content. ClamAV detected this file as Pdf.Phishing.Trojan, and ML classifiers also flagged it as malicious. The presence of these links suggests an attempt to lure users to external resources, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6473

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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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
  • 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://myafmc.com/clients/a/a5/a51d49d85de18111a3d718c63a5e5081/File/31224359452.pdf
    • https://printsolutions.ro/uploads/wysiwyg/files/zoniza.pdf
    • http://tsrmmessina.it/userfiles/files/dibukadebu.pdf
    • http://famillespourstarlight.ca/clients/a/a9/a9b42c05011d3bb27e7f7ec2ed30324f/File/37985990642.pdf
    • http://doublehappyvstheinfinitesadness.com/wp-content/plugins/formcraft/file-upload/server/content/files/160868657314a2---83200507151.pdf
    • http://shengnabei.com/uploadfile/file///2021072511364871.pdf
    • http://shuswapladystriders.ca/userfiles/file/ladofedog.pdf
    • https://limpjet.com.br/wp-content/plugins/super-forms/uploads/php/files/2051ef925ed5a74b7947ed9e8f658401/futiwexupupejedozupi.pdf
    • http://inewbus.com/wp-content/plugins/super-forms/uploads/php/files/p4affmdsaq62a8ju0luaepb9c0/sadufenoxidewinikufikil.pdf
    • https://www.engltg.com/wp-content/plugins/super-forms/uploads/php/files/6b52fbd3575f35dab50d10aeaf3bbeb2/15741862586.pdf
    • https://www.westcountrystoves.co.uk/wp-content/plugins/super-forms/uploads/php/files/ff040bf78ad51ca5e367a46f2514185c/nafun.pdf
    • http://drvision.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606ffde9a4a02---1335141972.pdf
    • http://chatyzvule.cz/uploads/27454124642.pdf
    • https://formapolis.it/wp-content/plugins/super-forms/uploads/php/files/4662dfa47dd8ba688c834e491fa4472f/61251856186.pdf
    • https://swimproject.eu/wp-content/plugins/super-forms/uploads/php/files/9108703f21e305714296586cd496543a/29780924032.pdf
    • http://yilip.net/userData/board/file/birorugo.pdf
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b420d57054---pekidewowew.pdf
    • https://globportal.com/upload/userfiles/files/66108227602.pdf
    • http://www.mywil.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1609f3eaeda7a4---51332194168.pdf
    • http://www.photobreak.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607b386b6e172---xagimuvowosumagose.pdf
    • http://afro-safari.com/upload/files/1281870867.pdf
    • http://airsoft1.ro/files/file/xoropuwalanog.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=cadillacs+and+dinosaurs+hack+apk+download
    • 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_off0000c2d6.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xC2D6 16792 bytes
font_01_sfnt_off0000dae4.bin
e77e02d95d50d2c3e834b53e4f706c5449a2c272c5ddb838d5b7f62145141329
pdf-font-stream PDF embedded font (sfnt) at offset 0xDAE4 47744 bytes
font_02_sfnt_off000158dc.bin
3acd5cb94efa5c1b791999d1ca4d631dfeb24baf17b84db0e0009ca9ea1f91df
pdf-font-stream PDF embedded font (sfnt) at offset 0x158DC 10688 bytes