Malicious PDF — malware analysis report

Static analysis result for SHA-256 3fd26b96195607b2…

MALICIOUS

PDF

80.7 KB Created: 2021-09-03 01:12:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 35df5ebc7767681127a7578da8dbac98 SHA-1: ef9bbaed68e30fd60619686aaac685fdb24756e7 SHA-256: 3fd26b96195607b22819b8133da9fade997a6ac8555301325dac1f3cf8058073
156 Risk Score

Malware Insights

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

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 numerous embedded URLs, many of which point to compromised WordPress upload directories or disposable hosting, suggesting it functions as a link farm to distribute phishing content or further malware stages. The presence of 'utm_term' parameters in some URLs indicates a potential phishing lure related to 'pan card change form'.

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://drafthe.ru/uplcv?utm_term=pan+card+change+form+pdf+new PDF link annotation
    • http://imobiliariaimperio.com/files/files/korixiwoxi.pdfIn PDF document text
    • http://asirakademi.com/resimler/files/gusowufuweletusodid.pdfIn PDF document text
    • http://cgt-fo-csc.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16079669b8ade5---12221441842.pdfIn PDF document text
    • http://nowyhotelik.pl/userfiles/file/pumowuzakafalik.pdfIn PDF document text
    • http://diennuocdanang.com/uploads/image/files/pawaxerepurid.pdfIn PDF document text
    • http://limpiasol.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f375a1c895a---997602089.pdfIn PDF document text
    • https://mogilew.ru/userfiles/file/sutitijavukutarofifibab.pdfIn PDF document text
    • https://anukulagrotech.com/userfiles/file/lofob.pdfIn PDF document text
    • https://tirthmobile.com/wp-content/plugins/super-forms/uploads/php/files/nh31g8q6ggijs0a6doj2dnfr62/sikorevem.pdfIn PDF document text
    • http://elateridae.com/images/FCKeditor/file/35538678970.pdfIn PDF document text
    • http://demenagements-remond.fr/userfiles/file/20210804063539.pdfIn PDF document text
    • http://casaperferiesantamariagoretti.com/writable/public/userfiles/file/nubudoz.pdfIn PDF document text
    • http://hanasushi6.com/uploads/files/29781665625.pdfIn PDF document text
    • http://urgentcarepb.net/userfiles/file/xegerawefosos.pdfIn PDF document text
    • http://www.immiflex.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b3cd75d540---31369363929.pdfIn PDF document text
    • https://chocoinmobiliario.com/wp-content/plugins/super-forms/uploads/php/files/78a81e8d329cf2993d2b432a8815ca52/pufinakumolajadubixis.pdfIn PDF document text
    • https://www.americansummercamps.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072679ae89cd---43451375286.pdfIn PDF document text
    • https://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/f62bdc3ed7f8808367df1dab11d2b1d3/32969516260.pdfIn PDF document text
    • https://vmkstroi.ru/wp-content/plugins/super-forms/uploads/php/files/001760c92867f9460bd94387de696985/gilagidebozalapegozagu.pdfIn PDF document text
    • https://travelselection.us/wp-content/plugins/formcraft/file-upload/server/content/files/160b07dbcd2bcb---jakusijuvegufov.pdfIn PDF document text
    • https://www.accidentinjuryalbuquerque.com/wp-content/plugins/super-forms/uploads/php/files/39oa54ua51f0vi8m9tqvalttse/79645157531.pdfIn PDF document text
    • http://drentmedischadvies.nl/uploads/files/46096282312.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_off0000d85b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD85B 17096 bytes
SHA-256: d06eb6a09059c8ea70b80e776fc15d34dcab994dc4b00bf5a0a4fb7f76ada9ac
font_01_sfnt_off0001049f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1049F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011cb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CB6 10752 bytes
SHA-256: 484e5cd6563e73ec2ddd17c5b0b0214a8f0c2a2a53f7a791bacf123412a4fa24

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