Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b0ae5e98c52ac4c…

MALICIOUS

PDF

214.2 KB Created: 2021-06-26 09:04:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f168c638a5cf955b9b6a825dbed766f7 SHA-1: 34cb1e8923415bec3b98d42a1fa98863f53eca5d SHA-256: 0b0ae5e98c52ac4c8dc22d5773e55023ab20591e05235001cb929606ae8d103e
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to multiple compromised WordPress sites, likely intended to host and distribute further malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan. While no scripts were directly extracted, the PDF structure and embedded URLs suggest a phishing or malware distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9800

Heuristics 5

  • 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.
  • 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://mg001.cn/upload_fck/file/2021-6-18/20210618011401269818.pdf
    • http://szao-spb.ru/images/news/file/57215840262.pdf
    • http://ranaghatpchsschool.org/userfiles/file/70886107818.pdf
    • http://www.kammerpop.de/files/file/30008571190.pdf
    • https://husvagnsexpo.se/wp-content/plugins/formcraft/file-upload/server/content/files/160cd69c69d189---28365456622.pdf
    • https://sklep-pinokio.pl/web/uploads/files/vuzuvezonama.pdf
    • https://snabavto.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6adffcba27---wemomajarizodipoxavo.pdf
    • https://autoroman-service.ro/imagini_ws/fodolokujalomo.pdf
    • http://www.eflox.net/wp-content/plugins/formcraft/file-upload/server/content/files/16094485f19be0---bafenajobegitux.pdf
    • http://e-cluny.cz/UserFiles/file/ponubofuruju.pdf
    • http://www.cenlajobinator.com/siteuploads/editorimg/file/5660440342.pdf
    • http://cbelmira.com/wp-content/plugins/super-forms/uploads/php/files/o4238bq7b56m6suo8096fjcr33/guvazakegemewiv.pdf
    • http://anandtouristcorporation.com/uploads/11441621823.pdf
    • http://www.nowsingapore.co.id/wp-content/plugins/formcraft/file-upload/server/content/files/160d6b38d6cfcc---nadupavuzafalifilofovoti.pdf
    • https://braviengenharia.com.br/wp-content/plugins/super-forms/uploads/php/files/8d77hsrq0ggdjj8udcrpeje75s/kodegozok.pdf
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/ni6iltc8gtij49qcqd72fb9uv0/4957025278.pdf
    • http://ahkjt.com/upfile/file/17307098288.pdf
    • https://legouic-peinture.fr/userfiles/file/gubanakopupixiro.pdf
    • http://churchliferesources.org/wp-content/plugins/formcraft/file-upload/server/content/files/160944b8243867---84266538778.pdf
    • https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607b106fac39b---momatelumo.pdf
    • https://llsindia.in/FCKeditor/file/nakitomikigeju.pdf
    • https://noddy.nu/images/file/vanirebesogejibefejov.pdf
    • https://messianic.live/wp-content/plugins/super-forms/uploads/php/files/a7ab33f98076f12256f965f58153f2db/sexozemurixirudodifovemo.pdf
    • http://flygarfield.net/userfiles/file/ladufo.pdf
    • https://globalclassic.org/wp-content/plugins/super-forms/uploads/php/files/k9omel4fsuas37rtid1v6059h2/52129135115.pdf
    • http://dodici12.ru/wp-content/plugins/super-forms/uploads/php/files/g1kkpo57q79924ua98h6t2cpm1/88354306769.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=how+much+pressure+to+make+a+diamond+from+coal
    • 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_off0002e0da.bin
ebc4b7e06fb4c608f2d03ec7faaee4200af9c2f80c128fb98fc0e3612e96f1ed
pdf-font-stream PDF embedded font (sfnt) at offset 0x2E0DA 21512 bytes
font_01_sfnt_off0003184b.bin
362df12bbcc31687bb82ce5b1d42370a21780ae98f379902603f4abc18f1de20
pdf-font-stream PDF embedded font (sfnt) at offset 0x3184B 11152 bytes
font_02_sfnt_off0003322e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x3322E 16792 bytes