Malicious PDF — malware analysis report

Static analysis result for SHA-256 9738cf2fa976819d…

MALICIOUS

PDF

84.6 KB Created: 2021-09-14 06:28:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: df89cd2ff87cbeeb136f1f2ff10eb2cb SHA-1: 9567640612b9f878f9c61f2c979c9de147bdde2d SHA-256: 9738cf2fa976819d2463950a7697c09de7d21f6826edfed7aeb69d5ae2472a2b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links pointing to various domains, many of which are associated with compromised CMS uploads or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the nature of the heuristics indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://ketchas.ru/uplcv?utm_term=espacio+arquitectonico+pdf PDF link annotation
    • http://crmloccitanecr.com/campannas/file/25976000967.pdfIn PDF document text
    • http://studiomanzella.com/userfiles/files/lelexo.pdfIn PDF document text
    • http://imapbook.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/65360050728.pdfIn PDF document text
    • http://lyzph.com/userfiles/file/Fl202109060624034319.pdfIn PDF document text
    • https://trsbarriersdirect.com/wp-content/plugins/super-forms/uploads/php/files/fs53drdgokl2mt5aqv71e6ghae/dafaro.pdfIn PDF document text
    • http://koreadramatour.com/FileData/ckfinder/files/20210907_40DAF98EAA2A0C68.pdfIn PDF document text
    • http://newtrichur.com/userfiles/file/tiwefa.pdfIn PDF document text
    • http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ab67072e48---77995084955.pdfIn PDF document text
    • https://timminsrenovations.ca/file/JfaYJKD0ITg09tHB.pdfIn PDF document text
    • http://tbm-mova.by/images_from_html_editor/file/60146022064.pdfIn PDF document text
    • http://box8websites.com/ckfinder/userfiles/files/64004738999.pdfIn PDF document text
    • https://junona.manyel.website/images/uploads/medium/31384429132.pdfIn PDF document text
    • https://dnm.tw/uploads/files/202109130615535233.pdfIn PDF document text
    • https://sailstudy.in/ckfinder/userfiles/files/lidedemunet.pdfIn PDF document text
    • http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e5fd779622---42439024021.pdfIn PDF document text
    • http://duet-czluchow.pl/userfiles/file/82797451191.pdfIn PDF document text
    • https://299-45.com/CKEdit/upload/files/12786510441.pdfIn PDF document text
    • https://acp-luxusingatlanok.hu/ckfinder/userfiles/files/13875428797.pdfIn PDF document text
    • http://mrhobbscoffee.com/images/uploads/file/77541011553.pdfIn PDF document text
    • https://nceptionsolutions.com/wp-content/plugins/super-forms/uploads/php/files/34844809b7be36a0962311a38f28b554/togin.pdfIn PDF document text
    • http://mdteam.se/ckfinder/userfiles/files/rabuxedabazirilejolixofi.pdfIn PDF document text
    • http://tatvideo.ru/ckfinder/userfiles/files/690058296.pdfIn PDF document text
    • http://xn--9p4b29dncp2cc6y.net/upload/fckeditor/file/57910722217.pdfIn PDF document text
    • 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_off0000e445.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE445 10796 bytes
SHA-256: 275d1f0250dd96e1220aa8f09dd0f74fb13b4aa0567e3ccbd2a891e52158f1ca
font_01_sfnt_off0000fd10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD10 18888 bytes
SHA-256: 8ebe5d3e249c59bc4ac747a34a352ec751e13a8324a37f1dee4ccfcb234a00ce
font_02_sfnt_off00012d10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D10 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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