Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c0a1cf193d1946b…

MALICIOUS

PDF

85.0 KB Created: 2021-09-12 21:56:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 24e329dfa6dcb37ddca9a7554fc9e52f SHA-1: b87ba186801a69a719054b349089e93b00d4c654 SHA-256: 6c0a1cf193d1946b1588d1f5956f2fa86b6ae62e8f6a0138d12b6071afdb9e52
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, a common technique for executing malicious code within documents. It also features a link farm pointing to various domains, some of which are hosted on compromised CMS uploads, suggesting an attempt to obscure the final destination and potentially distribute phishing content or malware. ClamAV detection as 'Pdf.Phishing.Trojan' further supports its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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 http://accessprecision.com/userfiles/file/39608495345.pdf
    • http://www.c-l-r-p.com/admin/ckfinder/userfiles/files/6097940008.pdf
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132f21716bee---99195477637.pdf
    • http://www.fashiongale.ro/userfiles/files/19810000152.pdf
    • https://sakura-bashi.com/uploads/files/202109061401069557.pdf
    • http://abwingstop.com/uploads/files/27752849910.pdf
    • http://www.taylormadetc.com/siteadmin/ckfinder/userfiles/files/60481430717.pdf
    • http://studiopol.com/userfiles/files/rumefitulane.pdf
    • https://www.douggoodkin.com/admin/ckfinder/userfiles/files/bofirovife.pdf
    • http://ersatzmonitor.de/userfiles/file/bomexip.pdf
    • https://minipowerpack.net/upload/files/27038728393.pdf
    • http://cowmoo.org/ckfinder/userfiles/files/49714755652.pdf
    • http://abnicum.ru/files/file/nukudax.pdf
    • http://1137.jp/app/webroot/js/ckfinder/userfiles/files/10575137224.pdf
    • http://kimsanghun.com/upload/userfiles/file/202197173175866.pdf
    • http://irollee.com/userfiles/file/92264371743.pdf
    • https://vashadvokat82.ru/wp-content/plugins/super-forms/uploads/php/files/e183dbc12c1f18956470aa01a831f542/majirijojanaw.pdf
    • http://pop-around.com/file_media/file_image/file/36709855009.pdf
    • http://bumsnab.ru/uploads/files/xatuba.pdf
    • https://a1-recruitment.fr/v2011/Files/fck_upload/file/95132217495.pdf
    • https://isagrinio.gr/userfiles/47649965284.pdf
    • http://www.sintsprev-ms.org.br/ckfinder/userfiles/files/22986054589.pdf
    • https://teplitsyoptom.ru/wp-content/plugins/super-forms/uploads/php/files/d0b82161a739aa62d243be14bbf86f76/wejunolatusi.pdf
    • http://vibrobeton.by/pics/files/zevamaserusimujutixokip.pdf
    • http://lrm.mcdonalds.ua/ckfinder/userfiles/files/ribujatuka.pdf
    • http://airzo.net/userData/board/file/nozuzudipuw.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=play+wma+files+on+android
    • 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_off0000ea37.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEA37 16792 bytes
font_01_sfnt_off0001024e.bin
c7ba9dd1744e754c6adc2b65776b12c7c96707053fb33085e0b7301f6f53242c
pdf-font-stream PDF embedded font (sfnt) at offset 0x1024E 10620 bytes
font_02_sfnt_off00011a95.bin
c688f692e2fb04421e629dd78a7b14fcf91a7ac295def82bf0504b0832d77b14
pdf-font-stream PDF embedded font (sfnt) at offset 0x11A95 16924 bytes