Malicious PDF — malware analysis report

Static analysis result for SHA-256 fedd18ca191fd5b6…

MALICIOUS

PDF

89.9 KB Created: 2021-07-07 08:15:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 619caf39ded93b5924948e95c7e420e6 SHA-1: d4273e9f5b9030ce59c7ebe498f2f5fcbc9718b3 SHA-256: fedd18ca191fd5b6dcd4d565ad16ac0e7cf4bd581ba17e959509b3fcfe603b9c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, with numerous URLs pointing to compromised CMS upload directories, suggesting an attempt to distribute further malicious content or phish users. No scripts were extracted, but the PDF structure and URL patterns are indicative of a malicious document designed for initial access.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9937

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 http://phenix-security.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607b965a8f83d---77279633619.pdf In PDF document text
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/qe54k9bv8nbnonv6pbp7ieo987/zorove.pdfIn PDF document text
    • http://lphs-the60s.com/clients/5/5a/5a84a5cabe7f31a06b4bf99f7e1b7ad6/File/6934892405.pdfIn PDF document text
    • http://christschoolblr.in/userfiles/file/59844118469.pdfIn PDF document text
    • https://grandplaza.bg/uploads/assets/file/fifizabefejipajozasoleki.pdfIn PDF document text
    • http://unseretochter.com/images/file/53560356023.pdfIn PDF document text
    • http://www.musicmaestrodiscos.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b49d218fc9d---51113454880.pdfIn PDF document text
    • https://www.sacda.org/wp-content/plugins/super-forms/uploads/php/files/bmu75kmga04bjk3qjp0uhdlkq3/tidibojebiwolenigaga.pdfIn PDF document text
    • http://ivepe-elearning.gr/assets/UserFiles/mainHome/file/23865132391.pdfIn PDF document text
    • http://ztkammer.at/uploads/file/sipukadenukinevelos.pdfIn PDF document text
    • https://saam.vn/images/content/file/5078590228.pdfIn PDF document text
    • https://mimpishiosatu.com/contents//files/nejenawadu.pdfIn PDF document text
    • http://mgocsm.in/userfiles/file/nobubotetegexow.pdfIn PDF document text
    • http://www.hypnotiseur.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094917cb94c0---fovukefimajix.pdfIn PDF document text
    • http://ideas4mypool.com/userfiles/file/bemamudorunevowunira.pdfIn PDF document text
    • http://mariopresto.pl/userfiles/file/26404142389.pdfIn PDF document text
    • https://glbtrader.com/userfiles/file/38325479713.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608c45ecbad7d---25672839255.pdfIn PDF document text
    • https://aashianarealty.com/file/ziniziguruvelisoxiso.pdfIn PDF document text
    • https://comesa.com.pe/wp-content/plugins/super-forms/uploads/php/files/m52juh0qki5bvbosfm8287b852/wipajuxobexarelafotinedun.pdfIn PDF document text
    • https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4007eafcb5---10102325086.pdfIn PDF document text
    • http://bouncebodysupplements.com/newerac2c/userfiles/file/vuxazanuf.pdfIn PDF document text
    • http://architects-desk.com/uploadsfile/23098574217.pdfIn PDF document text
    • http://www.gcsystem.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160af89145deef---taninarezidibafigud.pdfIn PDF document text
    • http://incucinaconalberta.com/userfiles/files/mozebujijujinefem.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=beat+ly+music+videoPDF 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_off0000fbdd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBDD 17968 bytes
SHA-256: 5d318dab06d0fedf35f19440596be65e6d8b5a48d6a3c28f434745ca7a46f651
font_01_sfnt_off00012a01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A01 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014218.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14218 10660 bytes
SHA-256: 7fe314b3dd42b5356457a6db6b5f5b802529a0490d2d3b7637c3e2dd83463944

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