Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb2f14592af2aa66…

MALICIOUS

PDF

91.3 KB Created: 2021-06-30 03:24:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 3802c696ddbbb6e4208f7f2b3a3fb651 SHA-1: 1bd44222af84c0a1c9326dee54297890699977e4 SHA-256: fb2f14592af2aa661fc16908e67c777cf56c421cdcfd7a8451ea08b693ac4d01
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to compromised WordPress sites, suggesting it's designed to lure users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with a phishing or malicious redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9924

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.zulfugar.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16099d61f19450---bodos.pdf In PDF document text
    • http://zaun-produzent.de/userfiles/file/mozumutizudipetarov.pdfIn PDF document text
    • https://amiablediamonds.com/wp-content/plugins/super-forms/uploads/php/files/6af3a23472e43b7bdeb83860e48474ea/71178447499.pdfIn PDF document text
    • http://www.blackhillsdancecentre.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c131f419433---famujabokexevuxoneluji.pdfIn PDF document text
    • http://vita24h.com/uploads/userfiles/file/60589371479.pdfIn PDF document text
    • http://call.ae/wp-content/plugins/formcraft/file-upload/server/content/files/16083e140e9e0d---sagusavegoverumasum.pdfIn PDF document text
    • http://nedirajtebosnu.net/userfiles/file/95640252722.pdfIn PDF document text
    • https://inclinedigital.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079fad8c3f14---48114459057.pdfIn PDF document text
    • https://evg-prague.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160b636738c5d9---gukiwogedosujogixor.pdfIn PDF document text
    • http://humanitool.ru/userfiles/file/junowesunumuti.pdfIn PDF document text
    • http://hauptlawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/porojemufidur.pdfIn PDF document text
    • https://www.kcequipment.com.au/wp-content/plugins/super-forms/uploads/php/files/a8f5ab569c53cf7a67ef1b059a5efbdc/61859674877.pdfIn PDF document text
    • https://vinisfarm.com/wp-content/plugins/super-forms/uploads/php/files/5298344772d8195f4364de195b9a81b6/82542000310.pdfIn PDF document text
    • https://chocoinmobiliario.com/wp-content/plugins/super-forms/uploads/php/files/a6c0a9d522cd67d164d350584089f03b/91123305164.pdfIn PDF document text
    • http://www.rlktechniek.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160853ec770532---40131807083.pdfIn PDF document text
    • http://alexanderkanevskyartistbiography.com/clientMedia/file/topoxaxax.pdfIn PDF document text
    • http://reiki-roots.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b44b0aa05d3---rikusuxawabi.pdfIn PDF document text
    • http://acecaalcoy.com/userfiles/file/wijidujubufa.pdfIn PDF document text
    • http://ipjanah.ir/wp-content/plugins/super-forms/uploads/php/files/n9mqsi9av74903f9qou1t039c4/18313955305.pdfIn PDF document text
    • http://palenice.net/obrazky_clanky/file/balilofasawedesijawek.pdfIn PDF document text
    • http://nuyewrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/9fbb0567e336a3a5724eb2ac464303d2/37497598454.pdfIn PDF document text
    • http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16081bb8e80f44---suzevajotevotusi.pdfIn PDF document text
    • https://nceptionsolutions.com/wp-content/plugins/super-forms/uploads/php/files/8ec8c3120a50586d3d77bca8fc1a4ee4/rujovotukasu.pdfIn PDF document text
    • https://newat.ru/wp-content/plugins/super-forms/uploads/php/files/070bdcb0810d66234ffaaac15c077e99/ferofedamalo.pdfIn PDF document text
    • https://bilbox.es/wp-content/plugins/super-forms/uploads/php/files/f1449e79181d25ecc5227dd13ef4db79/lurozipewipasiganugulu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=how+to+make+whipped+cream+from+single+creamPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA9A 11236 bytes
SHA-256: 806b929ca73c9c30e894c5e44897477bac152479a15f9966fda35f12bc0e73b0
font_01_sfnt_off00010484.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10484 16920 bytes
SHA-256: 2e0b0321b536a7c822d1c9d90f96c03aa0f25e5bfddd41843ccd9ccd234e8b95
font_02_sfnt_off00012fbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FBB 16092 bytes
SHA-256: 9d5144547e0b729630886a3ad3ce48e7da84b0115899dd9c2390406af6f0fecd
font_03_sfnt_off00014500.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14500 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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