Malicious PDF — malware analysis report

Static analysis result for SHA-256 2dd0ddc1e3d60205…

MALICIOUS

PDF

77.5 KB Created: 2021-09-12 19:52:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 87eafefd9e8c698a8542cadacd3f0cd2 SHA-1: aaf99601032d1350187f937e68826f26cc78a67d SHA-256: 2dd0ddc1e3d60205d8327cc1849c6bedd3150514c1076b65976f0ab03a0d0a79
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected by ClamAV as Pdf.Phishing.Trojan and an ML classifier flagged it with high confidence. It contains numerous links to potentially compromised websites, indicating a link farm designed to redirect users. The PDF structure and embedded links suggest it is used as a lure, likely for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://impulsa.mantareys.net/uploads/plantillas/files/goxasufanagovudef.pdf In PDF document text
    • http://location-appartement-venise.com/italie_documents/files/36862168064.pdfIn PDF document text
    • http://engroupe.ca/aym_image/files/rezagogimuwenit.pdfIn PDF document text
    • http://trainternational.in/wp-content/plugins/formcraft/file-upload/server/content/files/161323d4670102---88517635000.pdfIn PDF document text
    • http://structurecreative.com/wp-content/plugins/formcraft/file-upload/server/content/files/161320fc968c5a---15412167629.pdfIn PDF document text
    • https://mymovingestimate.com/wp-content/plugins/super-forms/uploads/php/files/eb2e6af967d618acb0606bf7ed39bb65/24867159022.pdfIn PDF document text
    • http://agcslohian.com/userfiles/file/malum.pdfIn PDF document text
    • https://pasifikendustriyel.com/userfiles/file/88653422806.pdfIn PDF document text
    • http://abacusnancy.com/userfiles/file/gisunenavuru.pdfIn PDF document text
    • https://tonmathunglan.vn/upload/files/59137972944.pdfIn PDF document text
    • http://ahjygjg.com/upload_fck/file/2021-9-11/20210911200523972886.pdfIn PDF document text
    • http://xn--80age2amlc.xn--80adxhks/pics/images/file/66850860818.pdfIn PDF document text
    • http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1613a22fd4e070---wokebezonabe.pdfIn PDF document text
    • http://agecarekorea.com/ckupload/files/23819133165.pdfIn PDF document text
    • http://xn--9i1b14l32gg2dsybq3b.com/upload/fckeditor/file/xiwubejujapamibo.pdfIn PDF document text
    • http://esistore.de/userfiles/file/bobevibojedulidetotata.pdfIn PDF document text
    • https://guijek.com/userfiles/file/56137222297.pdfIn PDF document text
    • http://zhizhencn.com/filespath/files/20210911105439.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/8946c46cafd89a016e80142535663740/tedetun.pdfIn PDF document text
    • http://fotocaroli.it/userfiles/files/viloditol.pdfIn PDF document text
    • http://akbarestate.com/survey/userfiles/files/sitavesagexixejunav.pdfIn PDF document text
    • http://www.icodar.com/wp-content/plugins/formcraft/file-upload/server/content/files/161309730a79b2---sikidax.pdfIn PDF document text
    • http://ambvetsanprospero.eu/userfiles/files/26275875443.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=retrofit2+java+examplePDF 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_off0000c8d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8D0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e0e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0E2 17716 bytes
SHA-256: 45ba8d6c7bee820e0f5dd88dedaef0b0a622e4769f573e10db54ef94b06964d4
font_02_sfnt_off00010f81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F81 10708 bytes
SHA-256: a94f5e96737288357b3cb6fb13f43f972e636dc09754c67ba8f05be9616ac316