Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a93b7371f693df0…

MALICIOUS

PDF

93.6 KB Created: 2021-06-27 04:53:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 332d41e31a7a16503ad338c69064da93 SHA-1: 9e394d39ea6e83bd93be58dd9338d6543f2f53a9 SHA-256: 0a93b7371f693df03a92f4c9bb3660de1d455da134194292a6a1a6ef7212ffea
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised WordPress sites, suggesting it's part of a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9927

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://www.bewegeninarnhem.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16077045cac972---24464789405.pdf
    • https://broadstripe.com/wp-content/plugins/super-forms/uploads/php/files/f47323e50ad8b6ac1311d4fae445ffb9/fubolotobupeda.pdf
    • https://performanceltg.com/wp-content/plugins/super-forms/uploads/php/files/39ad80cad4805e173790829b94a06ff5/vijabijavixafo.pdf
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/9de434106b5f7f9cec8c0e6d393579ff/sebakasiz.pdf
    • http://www.kevinbrooks.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1606effc40f505---59642580632.pdf
    • https://olmitek.by/wp-content/plugins/super-forms/uploads/php/files/plfahvsaj6v8d7vhnjvo0chap0/pedumiju.pdf
    • https://acronimocostanzo.com/userfiles/file/vixomemasewobifipusexele.pdf
    • http://akinmedical.com/uploads/file/65617780802.pdf
    • http://nd-58.ru/wp-content/plugins/super-forms/uploads/php/files/8696038746dc0e4412a446a73e698faf/58703214893.pdf
    • http://www.gcsystem.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160b9a7ee712c9---6204887018.pdf
    • http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607167419c4c7---jibizak.pdf
    • https://partner-support.net/user_data/userfiles/files/vamubek.pdf
    • https://mmszke.hu/files/file/55220325149.pdf
    • https://stpetejazz.com/wp-content/plugins/super-forms/uploads/php/files/d7cvvcp41c93ak8ggtvg2u63t3/16633081448.pdf
    • http://pnktools-th.org/ckfinder/userfiles/files/zamuzoxamorijepofisenep.pdf
    • https://wlao.on.ca/wp-content/plugins/super-forms/uploads/php/files/b493ce56e5319d31d28ca145ac936ee3/70665458138.pdf
    • https://sieompaysdebray.fr/lesiom/txt/imgadmin/file/34644236468.pdf
    • https://sip7.pl/autoinstalator/sip7.online/wp-content/plugins/super-forms/uploads/php/files/31266e31c54f84b35f9c6d3719e48873/koreraminizakapufijawibid.pdf
    • http://ivepe-elearning.gr/assets/UserFiles/mainHome/file/fegigigenelolo.pdf
    • https://bbensonmft.com/wp-content/plugins/super-forms/uploads/php/files/358d33592fbc2aac7e7330936b1aeaa3/91058968572.pdf
    • http://altaprecision.com/userfiles/file/70986266516.pdf
    • http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160c9b3cf25206---sofuworazotinovitisomebeg.pdf
    • http://scuderieverdina.it/scuderia/userfiles/file/3523514344.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=how+many+carbs+are+in+a+sleeve+of+ritz+crackers
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f182.bin
3aa41b3eb627a043e503fe95e7692e12e728147e0e14854b6d0ccca3c4e9d6f6
pdf-font-stream PDF embedded font (sfnt) at offset 0xF182 11044 bytes
font_01_sfnt_off00010b54.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10B54 16792 bytes
font_02_sfnt_off00012366.bin
b27d41244257a0f78222f9b4ad6cb6a861b0a733c40f3586e1f14d92477ec349
pdf-font-stream PDF embedded font (sfnt) at offset 0x12366 18140 bytes
font_03_sfnt_off000152af.bin
bfc7ce51a1a9b37382af61f0075eb0cdb972126da031002d338643432d80e6e4
pdf-font-stream PDF embedded font (sfnt) at offset 0x152AF 16252 bytes