Malicious PDF — malware analysis report

Static analysis result for SHA-256 92e69d6b57206175…

MALICIOUS

PDF

85.8 KB Created: 2021-07-04 22:06:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 3c07c2cad9fb388d452763e2b073d00a SHA-1: 9a935370eff95ed4468f974da089228a813b8684 SHA-256: 92e69d6b57206175ee5dc43221c026bf0abb1ffd0990f1574e7a8b85a44b38e0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users. The PDF structure and embedded URLs are consistent with phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://autotronics.vn/userfiles/file/26950776991.pdf In PDF document text
    • http://icltindia.in/userfiles/file/71158999589.pdfIn PDF document text
    • https://www.surajinformatics.com/wp-content/plugins/super-forms/uploads/php/files/cb4f5c37a71c463e47e6ea9bf8fbbf0b/15465671673.pdfIn PDF document text
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b13b34c8e1---pimedebilede.pdfIn PDF document text
    • http://www.risingstars.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160b5feb0d8242---rupojawexuwawededoj.pdfIn PDF document text
    • https://robertmatzuzi-massagetherapist.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16082a130b590a---jonijilotunugewemudovade.pdfIn PDF document text
    • http://www.medical-psychology.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1609238797c528---kapoxekanebiken.pdfIn PDF document text
    • https://miamivanservice.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c866ae8a33d---dosodosedusamegixokewak.pdfIn PDF document text
    • http://pebyte.com/wp-content/plugins/super-forms/uploads/php/files/m61e5f7ngvcf301cu7k3kssh31/98482012564.pdfIn PDF document text
    • http://hillsdalehorseboarding.com/ckfinder/userfiles/files/bufenisesiz.pdfIn PDF document text
    • http://www.ashtralmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607965319aff9---4739945052.pdfIn PDF document text
    • https://argumentua.com/i/file/newaladinexes.pdfIn PDF document text
    • https://www.avenueroadadvertising.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609be6c8b42f1---67062500124.pdfIn PDF document text
    • https://lion-trading.co.uk/wp-content/plugins/super-forms/uploads/php/files/s8mla49785g2lab7pjostrd3h2/71802356363.pdfIn PDF document text
    • https://ecef-groupe.com/wp-content/plugins/super-forms/uploads/php/files/r2rphl8ltvp9j8e7v6od4hai14/tewovonalev.pdfIn PDF document text
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/be9ra3i1eu1n4p52jaill5rg63/18694264432.pdfIn PDF document text
    • http://familiehollander.nl/images/uploadedimages/file/97449305706.pdfIn PDF document text
    • https://teplitsyoptom.ru/wp-content/plugins/super-forms/uploads/php/files/0c357f337bd18e163f79183c4171abe7/topunogazuvo.pdfIn PDF document text
    • https://engravestone.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ccf893d09b8---jilefaxoguw.pdfIn PDF document text
    • https://haps.company/wp-content/plugins/super-forms/uploads/php/files/clucq56gcegq9429bkjestqns0/99423731402.pdfIn PDF document text
    • https://cuisinescartier.ca/upload/editor/file/29383848604.pdfIn PDF document text
    • https://iwistw.com/upload/files/gizomuwa.pdfIn PDF document text
    • http://bethanybaptistcolumbus.org/clients/75549/File/94315028327.pdfIn PDF document text
    • http://rockpapersun.com/upload_mce_image/file/57151986808.pdfIn PDF document text
    • https://geneolock.com/locktactyuma/userfiles/file/ladawapefodu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=arrival+online+streamingPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED2B 10496 bytes
SHA-256: 535997432656b6576eafa256d7bb0c3ff673497324680aa10d9bffa3558040cc
font_01_sfnt_off0001050c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1050C 17184 bytes
SHA-256: c964c8d3cb960d7aae9909291d82cc12e72e88e4dcfc8be2f9a29fc7b0eabe90
font_02_sfnt_off000131fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131FA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1