Malicious PDF — malware analysis report

Static analysis result for SHA-256 0fefaf168c366fc4…

MALICIOUS

PDF

71.0 KB Created: 2021-05-04 06:09:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7fb0dc657fe3c031619fbc48bff763c8 SHA-1: b275e67175fee89abd7519815d4a83092341d799 SHA-256: 0fefaf168c366fc4198784d23276fd0ce1f303e31d0ce567eedf50331ab15b2f
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link farm pointing to multiple compromised WordPress sites, which likely host malicious payloads. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically a phishing or trojan delivery mechanism. Although no scripts were directly extracted, the presence of embedded URLs and the nature of the heuristic firings suggest the document is designed to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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 http://ahlhy.com/uploads/file/271453358735.pdf
    • https://felix-schulze.biz/wp-content/plugins/super-forms/uploads/php/files/tca4nnk3n87qsrlse22qgvdrn4/93021274866.pdf
    • https://jjmassociates.com/wp-content/plugins/super-forms/uploads/php/files/20b9484e8ecd263ae15390e8a1151f11/10221827687.pdf
    • https://fjordancv.info/wp-content/plugins/super-forms/uploads/php/files/e2b1621c559797766ac627551ea2c3b3/repedojunotezawokata.pdf
    • https://www.hausbootgeiseltalsee.de/wp-content/plugins/super-forms/uploads/php/files/cc3vp7p41ii48dahtg0lf27f6r/87190234436.pdf
    • http://miamiwars.pl/wp-content/plugins/super-forms/uploads/php/files/d000562e0812af5fe0772f23a70ce14f/42996085814.pdf
    • http://www.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/1607e6dd6ec70e---nofeselodubagokupu.pdf
    • https://thewentworthco.com/wp-content/plugins/super-forms/uploads/php/files/qjdp68qumsojo4a1eu2i5bv5v4/loredokamexekudakozus.pdf
    • http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e065d6bb89---bovewaroporaxabejuxag.pdf
    • http://www.telsercom.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fa373bf6c9---56223217769.pdf
    • https://www.histoiresdegroupes.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079655df073c---88555659407.pdf
    • http://mijneigenlift.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607b85d9dff34---widawejuvumiromibujewot.pdf
    • http://www.lavalledesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bf1ac88ccd---topafikesiledelanut.pdf
    • http://broadviewlibrary.org/uploaded_bvlib/file/kawilos.pdf
    • https://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087b4e989461---tamesato.pdf
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/a183cca1dd9a8f04b6623c5145943fec/fopafonarepanovik.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=android+developer+jobs+in+gurgaon
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c9f7.bin
19ecff59a010de2a7769498adc316656c5c1b6a0bb850e59c277f88893980c0c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC9F7 5196 bytes
font_01_sfnt_off0000dba2.bin
b3327e14a9231cf89b48b6a4a4a705b73bde8ac6d3f41a93c580cf0da24bcfa9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDBA2 10404 bytes
font_02_sfnt_off0000ff84.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFF84 4324 bytes

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