Malicious PDF — malware analysis report

Static analysis result for SHA-256 47bdfcd2050b591a…

MALICIOUS

PDF

86.2 KB Created: 2021-07-01 23:46:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c3d75a57c64ba5af1b529ce601771e1a SHA-1: b8b716de1753a0bce16b03daee9ff512ac312641 SHA-256: 47bdfcd2050b591a4c7ccfc8ee304f29e73a8395985b722526222124c70d28d4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

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 disposable hosting domains. The embedded URLs, such as 'https://nomylo.ru/uplcv?utm_term=local+property+tax', are likely used to host phishing content or distribute further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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://nomylo.ru/uplcv?utm_term=local+property+tax
    • https://fertilizerproductionprocess.com/d/files/79545580446.pdf
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be7b8fc1926---pakoposonisod.pdf
    • http://dbjhockeytournament.com/clients/f/f9/f9ff496842c877cbb4522510b668f2a2/File/60925107394.pdf
    • https://gulfsupremesa.com/ckfinder/userfiles/files/dukuze.pdf
    • http://dyglas.com/userData/board/file/27353468940.pdf
    • http://schooldistrictservices.com/clients/f/f6/f6ab1571d2cdf5e569af7b76e288b17c/File/82320297896.pdf
    • https://bdsvieclam.com/upload/files/jatinabifoz.pdf
    • https://remoteworkerclub.com/wp-content/plugins/super-forms/uploads/php/files/a947112626dbc800207744e297c5d207/39716775004.pdf
    • https://www.formwork.co.uk/wp-content/plugins/super-forms/uploads/php/files/bj1jvi4124kk02go31b0rftqj6/kuvodetewewitovopenok.pdf
    • https://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083750499a9b---15257120490.pdf
    • https://indobaliart.com/sitefiles/file/buzutiburipudiruj.pdf
    • https://deltagroup.bg/uploads/file/41476562944.pdf
    • https://f1com.ge/wp-content/plugins/super-forms/uploads/php/files/da353fe35330061e0e7a62819f6cbd9c/nedofakatuzufojugubexi.pdf
    • http://sjar-tech.com/uploadfile/file///2021052519321882.pdf
    • http://www.justgiveahand.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a061128f64f---futifoxabuxebazox.pdf
    • https://humanistbeauty.com/wp-content/plugins/super-forms/uploads/php/files/afr923dl79a1db6vk2s25rvrst/fibubegima.pdf
    • https://autoschiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607331fd5b9f0---85423355222.pdf
    • https://ivfnna.gr/wp-content/plugins/super-forms/uploads/php/files/faf374a70bafe9fe1ae8a1eadf44691e/65733321747.pdf
    • http://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abe56456531---xeduvakoferotibes.pdf
    • http://antik-cafe-bergen.de/wp-content/plugins/formcraft/file-upload/server/content/files/16087fd59ccff2---ziwenatefodesinolawo.pdf
    • https://studio45.live/wp-content/plugins/super-forms/uploads/php/files/u4n0p45rp4hg695l7nqr1t13et/negosizof.pdf
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098380c42da3---resumufe.pdf
    • http://www.canadavisaservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082d22920e2f---refaxubigowow.pdf
    • http://surtek.biz/image/files/20150201_064624.pdf
    • https://www.webhisto.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160b2b80d71088---pavarotata.pdf
    • http://mamnonlittlesun.com/upload/files/gefapatu.pdf
    • http://ahlhy.com/uploads/file/07175943369.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_off0000f0f1.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF0F1 16792 bytes
font_01_sfnt_off00010903.bin
dbb0f22d7e899e38a1e784c7679558dec5fafae919a6e585d3f8ded692c7a633		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10903 16684 bytes
font_02_sfnt_off0001347b.bin
38607f3ed8f85be0689769464e709f14b4304057917bc98e3aa2ad98c922fcb7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1347B 10176 bytes

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