Malicious PDF — malware analysis report

Static analysis result for SHA-256 36a271872692c206…

MALICIOUS

PDF

111.6 KB Created: 2021-07-05 04:55:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e53d55d574a438756c2f3dda02a97cfa SHA-1: 600157c7bfc8ebd69dfa77d6db5f4987385d5b6a SHA-256: 36a271872692c206dcaf411c0cd437aa22411b074be2e9d26ed59957f08f48fb
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to compromised WordPress sites, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with techniques used to lure victims into downloading further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9884

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 http://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa9e2f43590---zizideworezaneburituradon.pdf
    • https://arizonapoolcontractor.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dd9796b5e83---62586304710.pdf
    • http://wumag.pl/userfiles/file/94392487392.pdf
    • http://halmar.info/userfiles/file/10491955533.pdf
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160d4137a7611b---36987286175.pdf
    • http://strahovka66.ru/userfiles/file/81938076971.pdf
    • http://cricalliance.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607eaf3bbcc30---60595714188.pdf
    • http://cobansut.com/userfiles/file/terew.pdf
    • http://manavpublicschool.org/manav/userfiles/file/guwimar.pdf
    • https://www.synergyheart2heart.team/wp-content/plugins/super-forms/uploads/php/files/91ukb23fmcsv4jslb3nkpu2lvn/jaxeratimitasenufetezab.pdf
    • https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d9b9543009---1230162963.pdf
    • http://sorokolaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/fekubonuz.pdf
    • https://www.cukoyem.com.tr/wp-content/plugins/super-forms/uploads/php/files/josbg19sg57pru3qg0bmnbbdl2/pewawagen.pdf
    • https://www.msolartop.cz/wp-content/plugins/formcraft/file-upload/server/content/files/1606d628376511---betapewuwegedemade.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a446c6ebff0---kapuxuwojilexuxi.pdf
    • http://www.dadosefatos.net.br/wp-content/plugins/formcraft/file-upload/server/content/files/160735d66e51ea---58639542188.pdf
    • http://xn----8sbnbd9chja.xn--p1ai/userfiles/file/mulinusoximix.pdf
    • https://www.chartsunlimited.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/160983e1ebc2bc---xukimikutogabolomajop.pdf
    • https://weinquartier.at/wp-content/plugins/super-forms/uploads/php/files/b525bebc758c8b07321b0b9c7e92f000/xaxozenutobajaluwejujuk.pdf
    • https://bodwellassociates.com/wp-content/plugins/super-forms/uploads/php/files/d24b1b08491520acd0c4bbd5b462f5f3/1032633883.pdf
    • https://www.engltg.com/wp-content/plugins/super-forms/uploads/php/files/d7c1ab4060cab8af83a382af65703b7c/9209084273.pdf
    • https://www.lesson-online.org/wp-content/plugins/super-forms/uploads/php/files/9ub3fq82ppbi9ve3ji9kuli2r1/goripijokizifofopukawo.pdf
    • https://rffsev.ru/wp-content/plugins/super-forms/uploads/php/files/93000ab56a2718eb677ef07621194c45/xosobix.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=css+root+selector
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ecef.bin
2cedd58f202b7c3e019c2b8408c71e2ce74122ff87eed7ecef4e2b708f45d8a8
pdf-font-stream PDF embedded font (sfnt) at offset 0xECEF 9896 bytes
font_01_sfnt_off000102ee.bin
38bf54ff90b40d448d40a600f19e0bd4ea49f1aafff4e5bc054e196c3bcaa2fb
pdf-font-stream PDF embedded font (sfnt) at offset 0x102EE 17316 bytes
font_02_sfnt_off00013078.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13078 16792 bytes
font_03_sfnt_off00014886.bin
67fb8378a44e1fc9370fdd2bc487e730a72bee82a7bfca02cba19004a545dc32
pdf-font-stream PDF embedded font (sfnt) at offset 0x14886 38344 bytes