Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a9da60cc14c6861…

MALICIOUS

PDF

78.6 KB Created: 2021-08-12 14:47:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 78892bc5bff065eed19f6625e89ea4b2 SHA-1: af2d27b4d18b0a58ff9478730df06930ca9b0f51 SHA-256: 9a9da60cc14c6861a9256eba758fead3e9418a88514daa1e4dc42638a41039a2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, containing numerous URLs pointing to compromised WordPress sites and disposable domains. These links likely serve as lures for phishing attacks or to distribute further malware payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://infrive.ru/uplcv?utm_term=unit+electron+configurations+worksheet+2 PDF link annotation
    • https://people11people.com/uploads/File/59685646785.pdfIn PDF document text
    • http://omonetach.pl/foto/ilustracje/file/90960826492.pdfIn PDF document text
    • https://performanceltg.com/wp-content/plugins/super-forms/uploads/php/files/6a5d6575d3ff4d9e0d4a7747710b8d05/32277190274.pdfIn PDF document text
    • https://pankalconstructora.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c74b2222a1---21435296834.pdfIn PDF document text
    • https://leicht-spb.ru/wp-content/plugins/super-forms/uploads/php/files/b0750b3b3550fb22fdff7796e1225eb7/32285781983.pdfIn PDF document text
    • http://mognational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4276d7fb93---59825468873.pdfIn PDF document text
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/d54378d54cd7a6de4cdcd61f3ad91951/kenurusavusugedimen.pdfIn PDF document text
    • http://suamayin.biz/userfiles/file/52701938896.pdfIn PDF document text
    • https://ecoledesgourmets.com/userfiles/file/51572670888.pdfIn PDF document text
    • https://ytdrive.com/CKEdit/upload/files/7144063518.pdfIn PDF document text
    • http://www.stratcareerservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608fbbec317bb---73296068008.pdfIn PDF document text
    • http://strandedtattoo.com/file/gizavuzenijato.pdfIn PDF document text
    • http://staceyasp.com/UserFiles/file/vobazopivotef.pdfIn PDF document text
    • http://multiseal.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/160b8302282e29---32346100564.pdfIn PDF document text
    • http://phillipwhiting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b556ff44c0d---9818199657.pdfIn PDF document text
    • https://capitalsyndic.com/userfiles/file/49658681836.pdfIn PDF document text
    • https://perfecthospital.org/ckfinder/userfiles/files/11604264803.pdfIn PDF document text
    • https://maidintown.co.uk/wp-content/plugins/super-forms/uploads/php/files/6c89adb646fabdca29fd7fdb654c3c66/17496018511.pdfIn PDF document text
    • http://northcity.rs/slike/files/gavez.pdfIn PDF document text
    • http://3e-recycling.ru/app/webroot/filesfiles/15333824184.pdfIn PDF document text
    • http://ettermanenterprises.com/ckfinder/userfiles/files/97481988367.pdfIn PDF document text
    • https://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f01b9728a9---pukosizawiwilo.pdfIn PDF document text
    • 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_off0000cce4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCE4 17528 bytes
SHA-256: 4e2c03c3e4ca887d27c47350078e97ba7e1806fbb8f28257947bf802de6e43f5
font_01_sfnt_off0000fb08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB08 11020 bytes
SHA-256: f11b0489b638da1e160bf141720e9af58bde8c019b11bec08bc0278e472bdfd5
font_02_sfnt_off000114c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114C3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.