Malicious PDF — malware analysis report

Static analysis result for SHA-256 782d5b7008c9cf16…

MALICIOUS

PDF

78.8 KB Created: 2021-07-09 01:06:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e45049e74b7c00d271e6449e00323e2d SHA-1: 55013bb5a587fa31d133bd44086a97371149a053 SHA-256: 782d5b7008c9cf1689a249218034fcd0731b2982b3560daf47a0aecabbb6106a
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple compromised WordPress sites and potentially disposable hosting domains. This suggests the PDF is used to redirect users to malicious content, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://oniceh.ru/uplcv?utm_term=mpg+to+kml
    • https://www.sussexweddingservices.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c0bd195a395---ruvasasubiwilakoju.pdf
    • http://elijasprojekts.lv/files/file/4217177666.pdf
    • https://howardsteeves.com/wp-content/plugins/super-forms/uploads/php/files/1cd97b31ecd5b16a110142afa8ac2779/mojamufadopufubod.pdf
    • http://www.champcaregivers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d4d08bb04b---galovukun.pdf
    • https://www.myjamaicais.com/wp-content/plugins/super-forms/uploads/php/files/bccb6af3f60829e557977ce1aafa61cf/43413193589.pdf
    • http://makaifruits.com/wp-content/plugins/formcraft/file-upload/server/content/files/160de2712070b4---38657461495.pdf
    • https://hotel-la-licorne.fr/userfiles/file/69879571355.pdf
    • https://gauravkankariya.com/wp-content/plugins/super-forms/uploads/php/files/a80u042o7kqea1anfbs9vcano3/tuwovezesewobu.pdf
    • http://raunlarose.us/wp-content/plugins/formcraft/file-upload/server/content/files/1606e0bcd916ee---25160329347.pdf
    • http://www.carolglassman.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e2e8ef5797d---42713202670.pdf
    • https://stiff.pl/ckfinder/userfiles/files/zivirakejuvazerodobakot.pdf
    • http://sinara.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160763b76412b9---gerigerusapuzukof.pdf
    • http://angelojrobles.com/admin_initial_test/userfiles/file/62513521592.pdf
    • http://www.zulfugar.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16070436f51640---33221179581.pdf
    • http://www.champcaregivers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160835e39586d4---78472816014.pdf
    • https://amagi.la/wp-content/plugins/formcraft/file-upload/server/content/files/160e099701b42d---votowi.pdf
    • http://dailitara.lt/bites/uploads/file/fajudimota.pdf
    • http://taniaandjohn.com/clients/874109/File/wabux.pdf
    • http://test.uebersetzungen-nesselberger.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607531ddb6278---23422493407.pdf
    • https://la-klamm.org/userfiles/file/63864140929.pdf
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16086d673a7704---93404216237.pdf
    • https://www.prowallpanama.com/wp-content/plugins/super-forms/uploads/php/files/ea81e6b1a52f8cdfef6a90c8d4006640/duvazabubasan.pdf
    • https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d7af734d2d---goveboponesosuviluvi.pdf
    • http://tksvolga.ru/userfiles/file/wubogowovusote.pdf
    • http://younewstoday.com/task/userimages/file/rivifunumagaliselukag.pdf
    • 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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d4b2.bin
b537141e3a9fc03f565de5cca5e7860558af3f0340e49a5d7ad5bf612f1932f9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD4B2 16808 bytes
font_01_sfnt_off00010085.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10085 16792 bytes
font_02_sfnt_off0001189b.bin
07a1d0c6a1e2ac0f534aa6655b0782524005bbfbf8806fe2822b6ce3d98e9050		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1189B 9924 bytes

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