Malicious PDF — malware analysis report

Static analysis result for SHA-256 30c78d39307d6b70…

MALICIOUS

PDF

83.9 KB Created: 2021-07-05 22:10:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d42b7f01fad7226badd01ac9af37052c SHA-1: f33c95306e1aeaac5e271e21fb64acf7644cada0 SHA-256: 30c78d39307d6b70173a0d812b135af5bae3034f896f492c2eff7f5b0e3781dd
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous links pointing to potentially compromised websites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. While no scripts were explicitly extracted, the PDF structure and embedded URLs indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://smidgel.ru/uplcv?utm_term=how+to+upload+picture+in+pdf
    • http://desushibar.com/userfiles/file/timunanavixawenelimokulom.pdf
    • http://woonhuislift.info/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc0705f9d6---legofavixinidolewufo.pdf
    • http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afc6c16bd0d---16845095114.pdf
    • https://vetranhtuongmamnon.vn/wp-content/plugins/super-forms/uploads/php/files/af2omi43m45nru7mqm45tk1hel/tisosevapodojusomozowum.pdf
    • http://51www.org/uploadfile/file/54f0477e65434eaa208070ad59050650.pdf
    • http://agiusfuneraldirectors.com/files/file/47187040815.pdf
    • https://foxtailmag.net/wp-content/plugins/super-forms/uploads/php/files/6fc653aac14c08aa8a5e6857065c82eb/fijigejixuwajiwa.pdf
    • http://www.photobreak.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607052cf38bb5---11370850097.pdf
    • https://connect.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/ece10ae107441692356bfcfec199c678/jorofobuloj.pdf
    • http://bellsazshihtzu.com/clients/878694/File/tudajewuna.pdf
    • https://www.parkgest.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160a6f1042e6a2---48336236053.pdf
    • https://monacollection.ua/wp-content/plugins/super-forms/uploads/php/files/b70688e270fd6025b58a8cf3e3274343/61671058877.pdf
    • http://xn--80aagkbrca3apkgkee0a1bi.xn--p1ai/ckfinder/userfiles/files/81700779154.pdf
    • https://ooo-kenk.ru/userfiles/file/23368472690.pdf
    • https://ecoinkworld.com/wp-content/plugins/super-forms/uploads/php/files/75b373ac93e0da8966404d7476e5e1f8/41501346658.pdf
    • http://xn--90aoj0agf7cq.xn--p1ai/uploads/files/funiruwirexuj.pdf
    • http://www.loockuniformes.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/1607d4b9fe9a8c---10062110974.pdf
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b354691cd20---dunusegaxodil.pdf
    • https://lakecountyoralsurgery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ff4b6bcf1c---diwozaka.pdf
    • https://holzhaus-suedtirol.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a6593906ed1---nerigisi.pdf
    • http://www.fullmooneye.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfe10883c76---vetedotafodamilozijoj.pdf
    • http://www.marcelasemper.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083fa3a27a5a---defufama.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_off0000e4d4.bin
bf9a98d1d68fa2de6a7d86bc58313fb17b0220d77d86e8a2dbdb51141b16f391
pdf-font-stream PDF embedded font (sfnt) at offset 0xE4D4 17248 bytes
font_01_sfnt_off0001120b.bin
f0616653cbf7244938da65ab61340188ab5fd0eb867b90c81fadde36662df509
pdf-font-stream PDF embedded font (sfnt) at offset 0x1120B 10620 bytes
font_02_sfnt_off00012a6f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12A6F 16792 bytes