Malicious PDF — malware analysis report

Static analysis result for SHA-256 14283c3b9167ace1…

MALICIOUS

PDF

80.7 KB Created: 2021-08-19 02:20:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a1668f36bf54d14adf9810102a795a09 SHA-1: f42e6a793ca0a59773128f1a88a724a81916866f SHA-256: 14283c3b9167ace1308a6ee12a27acfb7c3b390835c9f103531db2dc8e06fcff
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan-like behavior. It functions as a link farm, containing numerous URLs pointing to various domains, some of which are hosted on compromised CMS uploads or disposable hosting. The primary purpose appears to be redirecting users to potentially harmful content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://areicon.com/images/file/91996967901.pdf
    • http://kiavysocina.cz/UserFiles/File/tumibokopufurofuwivalaz.pdf
    • http://mebizstekla.ru/userfiles/file/bixux.pdf
    • https://eobliecky.sk/userfiles/file/4888904437.pdf
    • http://modaxch.com/userfiles/files/pefaluvuroji.pdf
    • http://unipell.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a502bec0d7e---xisupuzijupotibareriwaxat.pdf
    • https://mangonebike.com/uploads/file/43573407799.pdf
    • http://www.vivelamusica.es/wp-content/plugins/formcraft/file-upload/server/content/files/1610627535810c---soremegujasu.pdf
    • http://box8websites.com/ckfinder/userfiles/files/mepazululojabuxetu.pdf
    • https://indikino.com/ckfinder/userfiles/files/41984789113.pdf
    • http://brukbet.com/user_images/file/54525072503.pdf
    • http://liebherr-tr.com/userfiles/file/81116350120.pdf
    • https://alistairmills.com/ckfinder/userfiles/files/remobivomigakawinupe.pdf
    • https://www.electriclighting.com/wp-content/plugins/super-forms/uploads/php/files/baf6f8afc08deb78905f2123252bd640/24718599207.pdf
    • http://garderoba.sk/images/_file/33705566820.pdf
    • https://soba05.org/wp-content/plugins/super-forms/uploads/php/files/fb464415faa155c58fb2179f383c9ee5/tagaxibepilononotokuji.pdf
    • https://qamarapps.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c92cd92118---16574236203.pdf
    • https://stef-nancy.fr/upload/document/moxudesubojanokekaluduxe.pdf
    • http://felixefontesadvogados.com.br/ckfinder/userfiles/files/63569681825.pdf
    • http://pmmagic.vn/userfiles/file/vodawowobonelabubivazuvav.pdf
    • http://x04ydivan.ru/userfiles/file/41671720700.pdf
    • http://sattamatkapatti.com/userfiles/file/wadexuwazod.pdf
    • http://dodici12.ru/wp-content/plugins/super-forms/uploads/php/files/me3mvgt5m8015uiiekev9d14h1/59564207794.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=9th+class+maths+textbook+telangana+english+medium+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_off0000d6ab.bin
e148e6a1e918629bdc1ea0f0624001dc7fb2ba870ea735db715f01f69b520aee
pdf-font-stream PDF embedded font (sfnt) at offset 0xD6AB 11472 bytes
font_01_sfnt_off0000f13d.bin
c05e62ed9e4850b86aaa653920868a428d12fe55a7933677516de92644a2c771
pdf-font-stream PDF embedded font (sfnt) at offset 0xF13D 16572 bytes
font_02_sfnt_off00011c47.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11C47 16792 bytes