Malicious PDF — malware analysis report

Static analysis result for SHA-256 fcce1d635580d867…

MALICIOUS

PDF

108.6 KB Created: 2021-09-04 06:15:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 600a5a30c1def67904182d669a964a4f SHA-1: bf5aa695878432f0405676c6fa41cd2b2ff3d4af SHA-256: fcce1d635580d86702d9ee5b855088ce21a70c0082477da367b041ca685b1635
156 Risk Score

Malware Insights

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

This PDF document contains a link farm, directing users to multiple external websites. Several of these links point to compromised WordPress upload storage, indicating a potential phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly suggest malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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 https://www.lamuccacompany.com/wp-content/plugins/super-forms/uploads/php/files/65d28cd2c4290529a4067e9664cd1d08/27187099626.pdf In PDF document text
    • http://mail.me.ntou.edu.tw/ckfinder/userfiles/files/20210731_040011.pdfIn PDF document text
    • http://brukbet.com/user_images/file/xisujafiduj.pdfIn PDF document text
    • http://ottotech.center/userfiles/file/nefapimukarip.pdfIn PDF document text
    • https://tpk-m.ru/files/file/65771808294.pdfIn PDF document text
    • https://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097727e5d0c9---turupodibopotosuvinaz.pdfIn PDF document text
    • http://d4sontario.com/clients/e/ed/ed023a0734c265ca673a92d1d81de675/File/vimagagive.pdfIn PDF document text
    • http://www.opencalgary.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a846a2af996---xugagasonapinizijepe.pdfIn PDF document text
    • http://zlhk.ru/upload_picture/file/96395946107.pdfIn PDF document text
    • http://www.cavice.fi/tiedostot/files/dunitavu.pdfIn PDF document text
    • https://www.wflorlando.com/wp-content/plugins/super-forms/uploads/php/files/3718b8edd4191da5a2bf352dfe57f4e5/62067503073.pdfIn PDF document text
    • http://baikalspring.ru/ckfinder/userfiles/files/8870986341.pdfIn PDF document text
    • http://fcimoveis.com/imgs/file/furokorukupotixulowop.pdfIn PDF document text
    • http://globalnetworks.de/www.galabau-poscher.de/main/preview/ckfinder/userfiles/files/35695178479.pdfIn PDF document text
    • http://dga.gr/ILC/img/file/57042382852.pdfIn PDF document text
    • https://100tmt.com/uploadimage/files/20210623175234.pdfIn PDF document text
    • http://abnicum.com/files/file/95315854222.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a2f077e208b---50139957798.pdfIn PDF document text
    • http://www.microsinusectomi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608444c3267b6---rivovafufaxegedezu.pdfIn PDF document text
    • http://stsaischoolamritsar.com/slbdavbatala/userfiles/file/63175957571.pdfIn PDF document text
    • https://ozmutludokum.com/userfiles/file/71980193464.pdfIn PDF document text
    • https://heykidsletscook.info/wp-content/plugins/super-forms/uploads/php/files/5e89573afec0ce6e0082c486f8812e61/95153807922.pdfIn PDF document text
    • https://www.partyshuttlebus.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607cdb67019eb---gezufuraliv.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=bari+sax+finger+chart+pdfPDF 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_off00014357.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14357 18356 bytes
SHA-256: 88b5c852f66ea91865722e751965021b15e6e5234f556063d2b436361aa3b063
font_01_sfnt_off000173cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x173CF 10888 bytes
SHA-256: a918d4ba68eb8a7b1c8b51b61a3cf9a3dd1c3ce6d16d4ee217667ebc5dc152b7
font_02_sfnt_off00018cc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18CC4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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