Malicious PDF — malware analysis report

Static analysis result for SHA-256 37de1998f6dbbada…

MALICIOUS

PDF

91.6 KB Created: 2021-08-18 17:15:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 89ac8ed610a93ea07ffd2ebf8d345adb SHA-1: 8db63dd57ba5fb7c1f12c54b024b52e063a23631 SHA-256: 37de1998f6dbbadac813834a3ea31cb939d946f83e09fe4551c031086fd39ce3
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains a link farm pointing to numerous compromised WordPress sites and disposable hosting, likely for SEO manipulation or to host further malicious content. The presence of callback phishing lures suggests an attempt to trick users into calling a fraudulent support number.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9914

Heuristics 7

  • 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 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://afmiletisim.com/resimler/files/56579541467.pdf In PDF document text
    • http://friluftsgruppen.se/wp-content/plugins/formcraft/file-upload/server/content/files/16106c39cdf53e---13357065143.pdfIn PDF document text
    • http://homestationrealty.com/userfiles/files/93362180782.pdfIn PDF document text
    • https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2765b1cfbb---juzexesofirojavodaduve.pdfIn PDF document text
    • http://getawaynewzealand.co.nz/wp-content/plugins/formcraft/file-upload/server/content/files/1607b4fffbcf02---67869406663.pdfIn PDF document text
    • https://www.lavishlook.se/wp-content/plugins/super-forms/uploads/php/files/b3125638537845c4853a239a12da2680/27106432370.pdfIn PDF document text
    • https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a24a4d21f3b---97443284858.pdfIn PDF document text
    • http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/160767c0685a67---94205742832.pdfIn PDF document text
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1607dd001924f6---peral.pdfIn PDF document text
    • http://www.driftime.ee/wp-content/plugins/formcraft/file-upload/server/content/files/160b29e14c11be---merokegabanizo.pdfIn PDF document text
    • http://kfnmsz.com/upfolder/e/files/20210802040000.pdfIn PDF document text
    • http://travellerisland.com/files/71288037061.pdfIn PDF document text
    • http://nhs1966reunion.com/clients/1/1c/1ca8f1639ee69cd7806809ed3bcda9bb/File/worekudewobo.pdfIn PDF document text
    • http://srmtteaparty.com/uploads/files/202108181224402339.pdfIn PDF document text
    • http://sylvianapoles.com/clients/e/e6/e63d90d46a840f0b3195f531cec11f6e/File/biridak.pdfIn PDF document text
    • https://agentcctv.com/userfiles/file/wufikusotagotopeputog.pdfIn PDF document text
    • http://eurolocal.info/sites/default/files/images/file/zoxad.pdfIn PDF document text
    • https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/26eb9515265cc617c7b509cf7d107cfc/52803528561.pdfIn PDF document text
    • http://xn----7sbab1bcaqplb0ccyi9d.xn--p1ai/files/file/jesawivo.pdfIn PDF document text
    • http://medob.org/SITE/files/editor/file/repekajim.pdfIn PDF document text
    • http://czechnews.cz/userfiles/files/5885030571.pdfIn PDF document text
    • https://aymsoft.us/aym_image/files/8276666652.pdfIn PDF document text
    • http://canigrup.com/userfiles/file/71420435632.pdfIn PDF document text
    • https://marksiegeldds.com/wp-content/plugins/super-forms/uploads/php/files/62b182a350531743fc67d078bec8767b/10561008527.pdfIn PDF document text
    • https://www.hdontheroadnapoli.it/wp-content/plugins/formcraft/file-upload/server/content/files/160fcaac0ea22b---dezonidevotagovizezi.pdfIn PDF document text
    • https://xn--i1aam8cb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/8ddac0d1eb0b0d25966dc554a4742267/14803671636.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=black+satta+king+desawar+live+resultPDF 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_off0000e8d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8D6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000100e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100E7 16892 bytes
SHA-256: 7bb558c053dc4e043e6ec2b99395c9865f054a5c24d8cc6c1cc1224a35179b35
font_02_sfnt_off000118a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118A2 17240 bytes
SHA-256: db01fc07189bb04dd38413a84992b6a17beb8553d610651b4c9073fef3b3158b
font_03_sfnt_off00014608.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14608 10824 bytes
SHA-256: 5bcdc5a6587a5b3e6e066944eec542d66ac283e73b49369f35de2d2908e25d3e

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