Malicious PDF — malware analysis report

Static analysis result for SHA-256 c84589a440f17dfb…

MALICIOUS

PDF

86.8 KB Created: 2021-06-21 20:21:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b37284bfaacdb3ea6cdfd4742c97922e SHA-1: f20cb5bf98d33436ad44e15a0d5b05b8881975a6 SHA-256: c84589a440f17dfbf7eb378be7ddf1f4ccc5bfed8fd1b1fa0e30899d95c9842e
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious. It contains a link farm pointing to numerous websites, many of which are hosted on compromised CMS platforms or disposable domains. The primary purpose appears to be directing users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://pensiuneavlasin.ro/wp-content/plugins/super-forms/uploads/php/files/agdok3j7ihmkvsri17nnblt83l/11121490410.pdf
    • http://www.alcera.ca/userfiles/file/kitufasumutesoxefuje.pdf
    • http://xn--e1aaafipco3bk8gra3b.xn--p1ai/upload_picture/file/98943309465.pdf
    • http://megalaserasia.com/upload/%5C/burunumuxevobisi.pdf
    • http://www.hypnotiseur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160870deaedb4c---fugisemetejurejomi.pdf
    • http://clubesquilacoma.com/uploads/files/70232458741.pdf
    • http://dynamic1984.com/user_file/file/nabitizifizarefewirasi.pdf
    • https://www.myjamaicais.com/wp-content/plugins/super-forms/uploads/php/files/d940b9b899158b8b7f79cf2256c027cb/zaxobipanera.pdf
    • https://webvitamin.vn/app/webroot/uploads/files/bafigubawiralepebewagugi.pdf
    • http://romanakladatelstvi.cz/userfiles/file/wuzos.pdf
    • http://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a43ae02aa05---furelapigarabosusulu.pdf
    • http://legalinet.eu/userfiles/files/13129259424.pdf
    • http://www.predoisiasociatii.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16087210a1d3b6---84534552696.pdf
    • https://geneticapanama.com/userfiles/file/jediwutes.pdf
    • https://www.webhisto.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160836e22abe38---69782692663.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=reflect+and+rotate
    • 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/
    • https://savannah.gnu.org/projects/freefont/
    • http://www.gnu.org/licenses/
    • http://www.gnu.org/copyleft/gpl.html
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dc18.bin
048fb1891f432488516cd811e7b04d68e7d39e548ca3495625137f8fb0c23ff4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDC18 6744 bytes
font_01_sfnt_off0000ecfd.bin
a929ae31bbdfb0e3abee2ca714ef10bd53579e43d09db5f827fad655a74569c4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xECFD 4844 bytes
font_02_sfnt_off0000fd88.bin
cf396cc5a0928254baa6f548148a4f594a2a461fac4a799c61f197a72d51b33c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFD88 5396 bytes
font_03_sfnt_off00011092.bin
128430d281f6987bcc1cfd40db3f2a4aa516d36df32281e74da043e9960c20d4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11092 10800 bytes
font_04_sfnt_off000135be.bin
0634e90da188bffdf711f6961421711b7c57bf61a649ed25c749d196624a0649		 pdf-font-stream PDF embedded font (sfnt) at offset 0x135BE 16612 bytes

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