Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc19fa9132d3165e…

MALICIOUS

PDF

84.9 KB Created: 2021-09-06 09:23:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: fc37ccff18139140625536e57f89e112 SHA-1: e9f82911ca769f4d41c5d07b63631e45c876df34 SHA-256: fc19fa9132d3165ed58195eb26a9665814d1b079838ff307677f96335651cb9b
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 Pdf.Phishing.Trojan. The file contains numerous embedded URLs, many pointing to compromised WordPress sites and disposable hosting, suggesting it functions as a link farm to lure users to malicious content. The presence of these links indicates an attempt to deliver phishing content or distribute malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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 https://pixomot.ru/uplcv?utm_term=ukulele+tutorial+chords+pdf PDF link annotation
    • https://bayardplaza.co.uk/wp-content/plugins/super-forms/uploads/php/files/jofg5d0cdmvl3h558u6t7t0n46/63668598312.pdfIn PDF document text
    • https://veglifekc.org/wp-content/plugins/super-forms/uploads/php/files//52382693473.pdfIn PDF document text
    • http://xtra360.net/campannas/file/dopulamemuwifowiguwusata.pdfIn PDF document text
    • https://kawanmto.org/contents//files/79350696608.pdfIn PDF document text
    • https://tortugafilms.ca/adminfiles/file/levigotipebulamisevutatex.pdfIn PDF document text
    • https://www.elementstraining.co.uk/wp-content/plugins/super-forms/uploads/php/files/de3evnqbg7jhe77t00i4psuvbv/85991250541.pdfIn PDF document text
    • http://dakmoto.cz/obrazky/file/60333104460.pdfIn PDF document text
    • http://beastyenergy.com/userfiles/file/katefewivoletatevu.pdfIn PDF document text
    • https://jamurgoreng.net/contents//files/98515597641.pdfIn PDF document text
    • http://kammatrans.com/userfiles/files/gewufitaxewilanuwexexuma.pdfIn PDF document text
    • http://dogoducthien.com/uploads/files/240444918.pdfIn PDF document text
    • https://www.escon.it/wp-content/plugins/super-forms/uploads/php/files/41e4573eb42fcf38fd79ce3915a0f114/lovukinobowobamumax.pdfIn PDF document text
    • http://multiseal.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/1607ce70abe296---nozobasagukanop.pdfIn PDF document text
    • https://destockbaby.com/ckfinder/userfiles/files/navejod.pdfIn PDF document text
    • http://shqinze.net/admin/upimg/file///46506716970.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abbfb0830de---20971291569.pdfIn PDF document text
    • http://dayou.tw/uploadpic/files/202108201211372726.pdfIn PDF document text
    • http://csc0731.com/userfiles/file/20210630130253_gxmeir.pdfIn PDF document text
    • http://timecraftz.com/userfiles/file/kadamusujunusukemazurib.pdfIn PDF document text
    • https://www.justgym.co.za/wp-content/plugins/super-forms/uploads/php/files/nmjnovkrd8pe3rq1gt85ertu6o/tofevaninokadilutasuko.pdfIn PDF document text
    • https://www.web2business.pt/wp-content/plugins/formcraft/file-upload/server/content/files/16095be734f6d7---pafewevuririxawenavojuk.pdfIn PDF document text
    • 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_off0000e398.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE398 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fbaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBAF 10812 bytes
SHA-256: 2ad291595bdd7171fe81e254fbfbf0b6e8d52d0009435101f06baabe06b4fed9
font_02_sfnt_off000114bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114BB 18900 bytes
SHA-256: 91ca396a80c54411459a2e93f7a426fc6886b9ff2d0d33b58f3078dcaf17b975

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