Malicious PDF — malware analysis report

Static analysis result for SHA-256 d907e6b387813479…

MALICIOUS

PDF

72.1 KB Created: 2021-06-28 05:44:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 21979304032bf254ad03c59bb8964969 SHA-1: 7e01691651a352ac61115bd620b7862acd6d0483 SHA-256: d907e6b387813479bf910dc5261c3a4514ee666c5313dd8e927f226a3d9d4ec5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

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 a link farm pointing to numerous compromised CMS upload directories, suggesting an attempt to obscure the ultimate destination of the malicious content. While no scripts were explicitly extracted, the PDF structure and link farm behavior are indicative of a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

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://smcertificationservices.com/userfiles/files/bopanolulorotegi.pdf
    • http://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0bca2905d9---kajuwujoxavux.pdf
    • http://bjhtdszdh.com/v15/Upload/file/202151036221771.pdf
    • http://www.moteco.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16071f00db96ee---wojowumawuzekoj.pdf
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/ea56145bf7f87a26dd706556ffddb612/sapiwevavuzodu.pdf
    • https://estidevelopers.com/wp-content/plugins/super-forms/uploads/php/files/63689d90315229f557c3c1a9814680fa/68993012324.pdf
    • http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ff4fe1669e---bidunofuxuzopovuzojulegu.pdf
    • https://bobecoingatlan.com/uploads/editor/file/59802502698.pdf
    • https://www.enviedecrire.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607adcbc61371---48152249695.pdf
    • https://broadstripe.com/wp-content/plugins/super-forms/uploads/php/files/ff00bc9655ee5908eea207e57a7f37a6/23446022225.pdf
    • http://3colorjazz.com/fckeditor/userfiles/image/tivaravajadid.pdf
    • http://www.justgiveahand.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608faaf0ef6d9---77038614595.pdf
    • http://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a4b13ba249---tovavexuzi.pdf
    • https://orldoc.ch/wp-content/plugins/super-forms/uploads/php/files/th284c1ujh2ecq2sjn8bkd2093/patijem.pdf
    • http://aaexpansionjoint.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c20c96b6122---74259490550.pdf
    • https://dprkoreatour.com/uploads/files/zomokegawimefixisiwidifo.pdf
    • http://www.veronicaneal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/160ce79508469f---99574732018.pdf
    • http://phantasos.org/userfiles/file/43392337193.pdf
    • http://www.gunyagder.org.tr/wp-content/plugins/super-forms/uploads/php/files/bh8tu1smgmau5614cvfsllff33/niremaxukomobaxa.pdf
    • https://usssecuritate.ro/userfiles/file/70218008529.pdf
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/259o3rjv5fo868780kifjdlss9/winumutetupeloxovipate.pdf
    • https://sirikulsteel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb33e56a153---lubejepisuradupu.pdf
    • https://archcosmeticstudio.com.au/wp-content/plugins/super-forms/uploads/php/files/533894ec525fafdd0c532da58aa6fde5/59451140205.pdf
    • http://omniatel.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607db93ce2ba2---16046526360.pdf
    • https://www.hed-endo.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160862564318d3---9023662963.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=write+a+program+in+c%2B%2B+to+display+the+pattern+like+a+diamond
    • 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_off0000b907.bin
8c44fb78c7bd5bbf3d8128d1e19b3b3e943b64098aff704922bbe37ff786b304
pdf-font-stream PDF embedded font (sfnt) at offset 0xB907 15432 bytes
font_01_sfnt_off0000e093.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE093 16792 bytes
font_02_sfnt_off0000f8aa.bin
57c6cd2ba5ff98d754d2b6d5ec6af89b87ef4642dfc32e5a43ddd1008713eb2b
pdf-font-stream PDF embedded font (sfnt) at offset 0xF8AA 11160 bytes