Malicious PDF — malware analysis report

Static analysis result for SHA-256 04a959a559a4ec10…

MALICIOUS

PDF

88.0 KB Created: 2021-06-28 05:12:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 34081c07c71d18fff7968078ae1aea47 SHA-1: 015c108a8b39fa5dcbee72006de9deafdb0b1da5 SHA-256: 04a959a559a4ec108ba500a8eeed2a48ee64177d8dd01e0c23417ad9a5b292a3
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. The document contains numerous links, many pointing to compromised WordPress upload directories or disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The presence of multiple distinct hosts and a high number of PDF links further supports this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://spectrumohio.com/wp-content/plugins/super-forms/uploads/php/files/78187a17ddd4497495b9113076320099/gaxodezuvefupirovewi.pdf
    • http://campingwithconvenience.com/files/files/vipidejorexidone.pdf
    • http://agriturismocorteerbatici.it/userfiles/files/82175240405.pdf
    • https://cutletsmeat.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094b882c0701---22370646377.pdf
    • http://www.agrosystem.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160752cf2f0908---gutotolege.pdf
    • http://murito.fr/ckfinder/userfiles/files/koleruziwisemikugimav.pdf
    • https://chicagoportablexray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa6896925a4---lolekokelawewapomi.pdf
    • http://kirks-pool.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089213ec5165---99022023857.pdf
    • https://livredart.com/ckfinder/userfiles/files/sixupata.pdf
    • https://www.sir.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160cf34f7f0235---77072451577.pdf
    • https://nam.it/wp-content/plugins/formcraft/file-upload/server/content/files/160be48038ed90---84588786352.pdf
    • http://www.christinemartin.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609be44546671---81659941771.pdf
    • https://leo-translate.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/16080202430996---13806742001.pdf
    • https://yidinfo.net/wp-content/plugins/super-forms/uploads/php/files/i60g0n6cbr38kq02bnug0nt6ge/26652392712.pdf
    • http://creative-format.com/upload/editor/files/rinosubokodep.pdf
    • https://gz-topstar.com/wp-content/plugins/super-forms/uploads/php/files/fcd0a86ae9131bb917b95dd159de18ea/20030320575.pdf
    • http://mirembeestate.co.ug/wp-content/plugins/formcraft/file-upload/server/content/files/160b1c8e64819a---95221056735.pdf
    • https://bellevuecommunityfoodbank.org/wp-content/plugins/super-forms/uploads/php/files/10c2dd8667a0cc7b9eda7061eacf93f5/rorususodelopefunujeneb.pdf
    • https://www.tessilgiada.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609998c422133---11894422318.pdf
    • https://mudateconmigo.cl/wp-content/plugins/super-forms/uploads/php/files/7adc02c81d79e3aadbb0eb302174a1f6/62273425396.pdf
    • https://consultingexpert.eu/fckeditor/userfiles/file/padebefowi.pdf
    • http://dbjhockeytournament.com/clients/f/f9/f9ff496842c877cbb4522510b668f2a2/File/25364875890.pdf
    • http://milcontabil.com.br/wp-content/plugins/super-forms/uploads/php/files/attooisjpiuj4bhhtp01hi1pk4/99337700149.pdf
    • http://www.brennholz-heinlein.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ba904621ff5---24987719608.pdf
    • https://www.potterycommercials.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607d9de3f2e5f---memajates.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=entity+relationship+diagram+for+inventory+management+system
    • 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_off0000f40b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF40B 16792 bytes
font_01_sfnt_off00010c22.bin
97b85e5751ef671ebe2217841d15d5383b956b6df4e1727329e97c4360ea0942		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10C22 11108 bytes
font_02_sfnt_off000125a8.bin
dd346a1c9cac904a805842d30cecc942ec8345c3245fd90c5d8b7f8e8c6c2f1d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x125A8 16984 bytes

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