Malicious PDF — malware analysis report

Static analysis result for SHA-256 eeec77cc63830604…

MALICIOUS

PDF

76.7 KB Created: 2021-09-02 16:11:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 07142ae7e374639de4ad81745daf37fa SHA-1: 9bed25dccb1117f02d78b32005a0571838634003 SHA-256: eeec77cc63830604176bbbf2c4856c4adb6627f024bc78cf8ae8e829c59c6cb7
156 Risk Score

Malware Insights

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

This PDF file functions as a link farm, directing users to numerous external websites. Several of these links point to compromised WordPress upload storage, indicating a potential distribution point for further malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9908

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://munnarinfo.in/userfiles/file/12852093887.pdf In PDF document text
    • https://instalacje-elektryczne.net/ckfinder/userfiles/files/51849363860.pdfIn PDF document text
    • https://www.hintonassociates.com/wp-content/plugins/super-forms/uploads/php/files/0b5e09d5bbd309645090dad02098e194/22077533649.pdfIn PDF document text
    • http://loveperfectionschool.com/upload/file/90823763289.pdfIn PDF document text
    • https://certifiedmoversinc.com/wp-content/plugins/super-forms/uploads/php/files/c0a15daf8efad6abb6bdead4e025e06a/fojimelesowagowenovibu.pdfIn PDF document text
    • http://3dprofi.net/images/uploads/file/pemud.pdfIn PDF document text
    • http://ok-poland.com/userfiles/file/pajesubogowejaxetamasaso.pdfIn PDF document text
    • http://fittbikese.hu/files/file/zijubategawewipowiwur.pdfIn PDF document text
    • http://salonlomi.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16073cac538d4b---sitasajufopuviwa.pdfIn PDF document text
    • https://serrechevalier-skifun.com/imagesfile/56897670603.pdfIn PDF document text
    • http://pixel-pro.ru/upload/file/tarowuxapolatironaz.pdfIn PDF document text
    • http://www.immiflex.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071c65c15049---pupul.pdfIn PDF document text
    • http://wo-kop.pl/userfiles/file/9111452037.pdfIn PDF document text
    • http://studiocalcinoni.com/userfiles/files/boxupoxuromevovilazip.pdfIn PDF document text
    • http://www.atrium-tuiles.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1f7f05c0d8---berojami.pdfIn PDF document text
    • http://usaoxin.com/userfiles/2021-6/file/13368589688.pdfIn PDF document text
    • http://ombs.ru/uploads/files/povumulovuluz.pdfIn PDF document text
    • http://yuseigachi.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160bcf9e3d8954---54047480673.pdfIn PDF document text
    • https://vnjhanoi.com/upload/files/nisokaxatolavevimaxiv.pdfIn PDF document text
    • http://ajtoablakcentrum.com/_user/file/10904655230.pdfIn PDF document text
    • https://roweryelectra.eu/app/webroot/uploads/file/16220037773646.pdfIn PDF document text
    • http://novussiteyonetimi.com/uploads/file/46055463342.pdfIn PDF document text
    • https://whitesal.com/data/images/file/7831_20210703133422.pdfIn PDF document text
    • http://for-rent-antwerp.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd9e46ddba1---jixivobiv.pdfIn PDF document text
    • http://www.grundys.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16116d991655fb---71534101519.pdfIn PDF document text
    • https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cadf7201cc---96215925261.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=jandy+pro+series+truclear+salt+system+manualPDF 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_off0000c827.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC827 10880 bytes
SHA-256: 925aba2dfc39d4d33c1fc744da1e02685ccd7c05bdb77dcf8ffceaa4e0362773
font_01_sfnt_off0000e14f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE14F 16744 bytes
SHA-256: 4fbfd32e13012ccfb5f3bc9d7f67f19d13abf88d439d76dac37a74800ae2f116
font_02_sfnt_off00010c88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C88 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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