Malicious PDF — malware analysis report

Static analysis result for SHA-256 e01271471059d1c9…

MALICIOUS

PDF

85.7 KB Created: 2021-07-08 00:50:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c15cd2d55f0692d8857bae299edb6294 SHA-1: 56500c3f73322fab94e58bd74641fdc0ff6c15ed SHA-256: e01271471059d1c9ecfe165f642dc79fbc794b208adb33d336d842750422fc2a
156 Risk Score

Malware Insights

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

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, pointing to multiple compromised WordPress sites and disposable hosting, suggesting a phishing or malware distribution scheme. The presence of numerous links, many with UTM parameters, reinforces the attack pattern of directing users to potentially harmful external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://beaumont-residence.com/wp-content/plugins/super-forms/uploads/php/files/nup8nq191ka9fd3albv32f85pe/sibuvisedikedine.pdf
    • https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/1606c8b6671e67---zakejiwumajagututazexu.pdf
    • https://nacionalequipamentos.com/ckeditor/uploads/files/12345453575.pdf
    • http://allseasonsart.com/uploads/fck_uploads/file/xigazalitarewazekuxe.pdf
    • https://iominneapolis.com/wp-content/plugins/super-forms/uploads/php/files/83f735689021c2ee14195406d3b02b0c/zojomawibekisul.pdf
    • http://zulassung4you.de/bilder/file/88789286324.pdf
    • http://kirilmazbardak.com/userfiles/file/17154128537.pdf
    • http://wamer.org/userfiles/file/40131634481.pdf
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1607dd83d6ce51---7257943314.pdf
    • https://xlspandoek.nl/userfiles/file/81531110931.pdf
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a36037c4d80---1917725865.pdf
    • https://theemperorsoldclothes.co.uk/wp-content/plugins/super-forms/uploads/php/files/cnj66tuu8j3o4ldok8h8td4782/kepumupeludidewave.pdf
    • http://www.expo-hotel.com/english/wp-content/plugins/formcraft/file-upload/server/content/files/160bdf8b5bfb9e---35071701400.pdf
    • https://gionggiacam.com/ckfinder/userfiles/files/tapesarunatogovututivoka.pdf
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/2hjsu5bfqm1oqotqgu575mg6j6/koxalatevarakudur.pdf
    • http://www.melloecastro.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ef6493ed57---11788701134.pdf
    • https://wholisticvibrations.com/wp-content/plugins/super-forms/uploads/php/files/53aad073ebecff6d3e3f22be61620923/xirudegina.pdf
    • https://artsketch.ru/wp-content/plugins/super-forms/uploads/php/files/1792cec69be32a1e37aff40135fcb01c/65674189607.pdf
    • http://www.sg-callenberg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160baaee97948a---46735252030.pdf
    • https://www.ltgpartners.com/wp-content/plugins/super-forms/uploads/php/files/f0816b953d596f4f2959bc55f4a7a9bd/kowuruvomizidexavovavowi.pdf
    • http://www.optionassurance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160843db52f77d---46745974240.pdf
    • https://llibreriaha.com/img/events/file/kusimiz.pdf
    • https://www.sussexweddingservices.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a44aea2c05e---bazefanor.pdf
    • https://www.reparaciondebomba.com.ar/wp-content/plugins/super-forms/uploads/php/files/r0pda8irptg1pa583tk3bkkd22/sonunuz.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=what+is+moral+philosophy+in+ethics
    • 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_off0000ed56.bin
2b89f80368a58bf619521f3cabd78931233feafeb11e234cd992b715f55dffa1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xED56 16716 bytes
font_01_sfnt_off000118ea.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x118EA 16792 bytes
font_02_sfnt_off00013101.bin
2fe19db99b41f0dd5f184fa6b7461fa3ee5126ead6f60129a3f6084fc04f9f6b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13101 10744 bytes

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