Malicious PDF — malware analysis report

Static analysis result for SHA-256 a148ea8e8e0abf1a…

MALICIOUS

PDF

81.9 KB Created: 2021-06-26 01:22:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7cf6fd0b00a06498dc1bc8a9a866bf82 SHA-1: 5dda6f412606e104e35400c6dfeed42ec49a3c22 SHA-256: a148ea8e8e0abf1a2493b4bd4b317634b963db7c494079943ccec5c04a1b3536
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, many pointing to compromised WordPress sites, suggesting a link farm designed to redirect users. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious document lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9833

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://buka.ru/sadm_files/pefotekugizelusoxi.pdf
    • https://www.msolartop.cz/wp-content/plugins/formcraft/file-upload/server/content/files/16076cfc781bbe---60431097088.pdf
    • https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/46edf57c8f6f2db4cac2d050834cb4af/bukavave.pdf
    • https://ncfouting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc7f9737ac5---sogozedefokudeme.pdf
    • http://raunlarose.us/wp-content/plugins/formcraft/file-upload/server/content/files/16088f87201242---34259404700.pdf
    • https://unique.global/wp-content/plugins/super-forms/uploads/php/files/eadff0c4b403f74c4e668b93274e014c/dexabozo.pdf
    • https://nam.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608a742553edf---11530813637.pdf
    • http://pwmtqatar.net/userfiles/file/39229303598.pdf
    • https://www.a2zmedical.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608d4b0dcbdc1---nonabozigip.pdf
    • http://stsaischoolamritsar.com/slbdavbatala/userfiles/file/8497740415.pdf
    • https://coloreverything.love/wp-content/plugins/super-forms/uploads/php/files/663acbc7e4bc91f2aca4c54a6ee9fc5c/85754298789.pdf
    • http://perfectthesale.com/wp-content/plugins/formcraft/file-upload/server/content/files/160790b6b24f52---59909937822.pdf
    • http://mko-yug.ru/wp-content/plugins/super-forms/uploads/php/files/cdaadd1d21123392a164a98b569b9a2c/gijizepitasudunu.pdf
    • http://xn--h1acbpobggs.xn--p1ai/data/files/1828090383.pdf
    • http://seanmore.com/userData/board/file/32633480959.pdf
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606d93f1d1525---kikosazovakekafejubazil.pdf
    • http://www.truca-taoules.com//ckfinder/userfiles/files/fiketukefibere.pdf
    • http://www.whirlpool-beachcomber.at/wp-content/plugins/formcraft/file-upload/server/content/files/1607400dfc3dc5---tabulibewupaniro.pdf
    • https://lea-inc.com/wp-content/plugins/super-forms/uploads/php/files/10e77ac874b5c8662b80164a606aa87b/94142719147.pdf
    • https://gearforfree.com/wp-content/plugins/super-forms/uploads/php/files/1gvsjeneqps150bg3fu90vbvi7/33855447923.pdf
    • http://ahlhy.com/uploads/file/030544297583.pdf
    • https://mygamedaysports.com/wp-content/plugins/super-forms/uploads/php/files/05d7ffacb16cc8c23a232456bbdaa97e/50221839449.pdf
    • https://seerupit.dk/assens/file/wuxiram.pdf
    • https://moniimpex.com/wp-content/plugins/formcraft/file-upload/server/content/files/160860c6753003---46702827150.pdf
    • https://www.msolartop.cz/wp-content/plugins/formcraft/file-upload/server/content/files/160768ceeb8665---2173328913.pdf
    • https://www.jscorporation.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/16089e300753e0---kamodumisukujosabatimun.pdf
    • http://iamsoldierfit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8baf0b3a89---semukebaxoxiramokipi.pdf
    • http://www.zopfitravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a62c011f74f---94025411596.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=save+individual+pdf+pages
    • 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_off0000ddb8.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDDB8 16792 bytes
font_01_sfnt_off0000f5cf.bin
44a5607362a4e811aaf7bdba2d104a3a67cf7b22d38b72545add30fa1cf3754e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF5CF 10596 bytes
font_02_sfnt_off00010ddc.bin
e1edb02b39fad879ba99713f753ce5ed3d742377dc1e61bc8a7f9ca427957432		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10DDC 17108 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.