Malicious PDF — malware analysis report

Static analysis result for SHA-256 938408c214477e7f…

MALICIOUS

PDF

76.2 KB Created: 2021-07-02 14:50:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 541a52bdb8e4ba5d8881330a00c490f3 SHA-1: cbeafa528ec8fb7d6307592f426abbeb97c2b71f SHA-256: 938408c214477e7f9d923191e6f573b0fc4d7d215fa380be2ac698946e68ee35
156 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which point to compromised CMS upload directories or disposable hosting, indicating a link farm designed to redirect users. The presence of these links suggests an attempt to lure users to external malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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://bednidhitraders.com/userfiles/file/50428296574.pdf In PDF document text
    • https://www.rydalmereprestige.com.au/wp-content/plugins/super-forms/uploads/php/files/5mvcj99qgottj0lpfa2qvp35qp/50883816549.pdfIn PDF document text
    • http://nc2e.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607726672e43f---wenalokevu.pdfIn PDF document text
    • https://kham.vn/userfiles/file/zamopefepuzekakibelu.pdfIn PDF document text
    • https://sharidendesignasphalt.com/wp-content/plugins/super-forms/uploads/php/files/0f548ccc42c0acc0d6560d0653ddbb93/66709730177.pdfIn PDF document text
    • http://www.altrus.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160a6257156a9b---74583315067.pdfIn PDF document text
    • https://www.dartmusicfestival.co.uk/wp-content/plugins/super-forms/uploads/php/files/dc103b5b18c5d3369f440fbe519083a8/11785439129.pdfIn PDF document text
    • http://ttlengenharia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607ff80119335---vegizinituniwebi.pdfIn PDF document text
    • https://abeess.com/userfiles/file/28197792704.pdfIn PDF document text
    • https://mercedesmazo.es/wp-content/plugins/formcraft/file-upload/server/content/files/1607f678268b1d---tixojevatiwupiketo.pdfIn PDF document text
    • http://www.icodar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160904f323cf24---66757262953.pdfIn PDF document text
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/3a4t4sbpvi34amsi5f6inqgm5a/3224038941.pdfIn PDF document text
    • http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607d5523a4d48---penigemukokuk.pdfIn PDF document text
    • https://mission4recruitment.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071691ccb29e---xaluz.pdfIn PDF document text
    • https://hmjrgoldhockey.org/wp-content/plugins/super-forms/uploads/php/files/44701b33a1ceee1bc354ecffb1399978/13826305742.pdfIn PDF document text
    • http://villa-carlshorst.de/sites/default/files/file/60065874041.pdfIn PDF document text
    • https://munord.com/wp-content/plugins/super-forms/uploads/php/files/0e07c9d6f89233b24e87deeb1c05b95e/gukukebobipuxunedadap.pdfIn PDF document text
    • http://amtutoring.com/clients/865321/File/migisixilakejanami.pdfIn PDF document text
    • https://argumentua.com/i/file/vasolala.pdfIn PDF document text
    • https://acornschoolcharleston.org/wp-content/plugins/super-forms/uploads/php/files/ec131ab8af0d9d0e7589dfa7321a9766/86817222485.pdfIn PDF document text
    • https://siahotel.com/userfiles/files/mikov.pdfIn PDF document text
    • https://www.mercedesbenzofaustinservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607617b25e806---6733932397.pdfIn PDF document text
    • https://smarttactic.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16074507bb0de7---lotisuzukumif.pdfIn PDF document text
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/tr7p95bv88jv78uag9d0cdveo5/99592841649.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=auditory+discrimination+activitiesPDF 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_off0000c6cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6CB 10744 bytes
SHA-256: ca530993bfeb183bff1c93966768184c3c525facda97942ea2b681a03892c032
font_01_sfnt_off0000df97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF97 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f7a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7A9 16932 bytes
SHA-256: e1b9fef946bcc3c4ac07d77b9b0690a5bc634b6a74a565ba9f9c461d2fb87369

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