Malicious PDF — malware analysis report

Static analysis result for SHA-256 717c3bc30638c6b3…

MALICIOUS

PDF

78.7 KB Created: 2021-10-07 07:50:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 2b250804ce107b1c15b39e6ec619e3aa SHA-1: c13efff980b2fa4eca7dad3b06a297e5968179b6 SHA-256: 717c3bc30638c6b383d1a6dd53998b016eed7590a41a50cb2d4e3812f35ae61d
184 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 numerous external links, including one pointing to a raw IP address and others hosted on potentially compromised websites, suggesting a phishing or credential harvesting attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://kingsfinancialconsulting.com/userfiles/file/68221215302.pdf In PDF document text
    • http://lepetitjaunais.com/userfiles/file/63785013009.pdfIn PDF document text
    • https://kaptenhoki.net/contents/files/mafimi.pdfIn PDF document text
    • http://www.anglometais.com.br/adm/Editor/ckfinder/userfiles/files/70916673370.pdfIn PDF document text
    • http://www.park-seversk.ru/other/js/ckfinder/userfiles/files/vitukimadatabo.pdfIn PDF document text
    • https://mapithanhcong.com/upload/ck/files/limobewatoj.pdfIn PDF document text
    • http://www.acefence.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134f469b52fb---19587817420.pdfIn PDF document text
    • https://rybczewice.pl/userfiles/file/zarelalure.pdfIn PDF document text
    • http://ingenermarket.ru/userfiles/81620413654.pdfIn PDF document text
    • https://bitree.ru/ckfinder/userfiles/files/likigosazivelokaruwuvuwev.pdfIn PDF document text
    • https://www.glasswindowequipment.com/wp-content/plugins/super-forms/uploads/php/files/0905ed489cacec2148d9cf1fc6c3e223/46357737437.pdfIn PDF document text
    • http://ilkconstruction.com/Images/Media/files/87552115351.pdfIn PDF document text
    • https://www.paparazzirestaurant.com.au/wp-content/plugins/super-forms/uploads/php/files/52d791474a9a7b62cd0f92139cc9e388/gurenikad.pdfIn PDF document text
    • http://140.121.180.103/ckfinder/userfiles/files/44437908127.pdfPDF link annotation
    • http://style4.allwebeasy.com/userfiles/files/xezedoposavulufiwoniv.pdfIn PDF document text
    • http://velapower.com/glwh/UploadFile/file/2021091602361773499.pdfIn PDF document text
    • http://vertracapital.com/uploads/files/kinodopufokosajovarurolor.pdfIn PDF document text
    • http://agaugservice.ukrkarta.ua/fckeditor/userfiles/file/meterixofefofipux.pdfIn PDF document text
    • https://produse-zilan.ro/files/patulukifuzadalovadem.pdfIn PDF document text
    • http://101balkon.ru/upload/files/fegujemetumoruvurotig.pdfIn PDF document text
    • http://tdbm.vn/upload/files/bikexomibegaro.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=regnier+extreme+screen+theatrePDF 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_off0000ca86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA86 18976 bytes
SHA-256: b374caaff5c5832f33141b7c02c9a61da205bc6b15f8ecd39308165bcc630e6b
font_01_sfnt_off0000fcc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCC8 10656 bytes
SHA-256: ed941627005d7317c1c8b087569fdb03b6f59eb7d2eb669892225ad3c12da9e5
font_02_sfnt_off00011506.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11506 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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