Malicious PDF — malware analysis report

Static analysis result for SHA-256 006e7bcbab0e222c…

MALICIOUS

PDF

76.1 KB Created: 2021-09-20 01:57:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: ff753b7467499c51177e0a63cd51e62e SHA-1: 3581e2801f92a38c87eb9094a4c769777d5efb11 SHA-256: 006e7bcbab0e222c6ef7285e5e0060268628f7533653e2ab60a32a0847ca78a3
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm or SEO manipulation tactic. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

Heuristics 7

  • 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.
  • 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 https://kvartira-zalog.ru/wp-content/plugins/super-forms/uploads/php/files/f4154e174aa57d9c3049756ab5569d0b/91514673988.pdf In PDF document text
    • http://conhantaoankhanh.com/webroot/img/files/najumoz.pdfIn PDF document text
    • https://infotechb2blite.com/bot/ckfinder/uf/files/79111814857.pdfIn PDF document text
    • http://med-os.com/user_upload/file/rurinajofozila.pdfIn PDF document text
    • http://argra.rs/wp-content/plugins/formcraft/file-upload/server/content/files/16141057b1fcc7---maladizirugodu.pdfIn PDF document text
    • http://h-p-n.fr/catalogue_dynamique/file/kusafimafifejuwel.pdfIn PDF document text
    • http://p-itos.net/admin/userfile/image/file/vumademin.pdfIn PDF document text
    • https://sportcity.bg/webroot/img/content/files/miwikejekazijovebupozo.pdfIn PDF document text
    • https://ist-lb1.istanajp.com/contents/files/9402617306.pdfIn PDF document text
    • http://frankifoto.com/uploads/pages/files/kinunubojodasodi.pdfIn PDF document text
    • http://lamarchesainterita.be/lamarchesainterita/imgdb/news/files/90809388766.pdfIn PDF document text
    • https://rajaketiga.com/contents/files/83151747352.pdfIn PDF document text
    • http://theopenhouseclub.com/wp-content/plugins/super-forms/uploads/php/files/25f784f955b0eb2587cf3f40f9d305b5/xelekumuruzutugunawajo.pdfIn PDF document text
    • http://pressvaluation.net/FCKeditor/editor/filemanager/connectors/userfiles/file/fogezitaliguwotazag.pdfIn PDF document text
    • http://darstin.com/userfiles/files/20592261274.pdfIn PDF document text
    • http://gpp300.fr/userfiles/file/fesubuvaba.pdfIn PDF document text
    • https://www.santaterezinha.com.br/js/ckfinder/userfiles/files/88842751764.pdfIn PDF document text
    • http://hzqljsj.com/images/upload/File/rotuvota.pdfIn PDF document text
    • http://efuegypt.org/userfiles/file/zugowunakijubasavox.pdfIn PDF document text
    • http://moiarchitekci.pl/pliki/file/sixuwapawetubiw.pdfIn PDF document text
    • https://www.loscam.com/lib_common/ckeditor/ckfinder/userfiles/files/5586031886.pdfIn PDF document text
    • http://vwtint.com/userData/board/file/75404789154.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=minecraft+medieval+fortress+book+freePDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c294.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC294 10928 bytes
SHA-256: 56f87fe8470b26ad76f2cfbfd3b9ccb9455396d58c2965cdebb8154085a6bc4a
font_01_sfnt_off0000dbf1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBF1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f403.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF403 18156 bytes
SHA-256: 349d18c3915cfba5c8e9f327240e60e1a06d1262aaa6b37d6f5c41ecd3e9a6f1

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