Malicious PDF — malware analysis report

Static analysis result for SHA-256 94e7aa719eaf154d…

MALICIOUS

PDF

73.2 KB Created: 2021-09-08 09:55:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 44b66f78c7e55689637866fbb607a04c SHA-1: 50b35bb519757116a4f0e8e267cfaac8d30625c1 SHA-256: 94e7aa719eaf154d000acc25410e9b30c10547197a18fab5a37ca95357cf9e29
156 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate the document functions as a link farm, with numerous embedded URLs pointing to potentially compromised or disposable hosting. These links are likely intended to redirect users to phishing sites or download further malicious content.

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 http://waberry1969.com/clients/877040/File/28497766232.pdf In PDF document text
    • http://kraljicabih.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098189bbbd22---72674068513.pdfIn PDF document text
    • http://banquat.com/userfiles/files/zotepemonofaj.pdfIn PDF document text
    • http://goteneplast.se/files/images/file/tiriludojeregegefotolevow.pdfIn PDF document text
    • https://zionapostolicministries.org/uploads/file/42178628352.pdfIn PDF document text
    • http://rocb-ap.org/file_media/file_image/file/41241284853.pdfIn PDF document text
    • http://collectifff.be/imgdb/accueil/files/36793854611.pdfIn PDF document text
    • https://ymvii.com/admin/upload/files/vevunipa.pdfIn PDF document text
    • http://godswaynehemiahmbc.com/clients/878002/File/jekosaveririsezazo.pdfIn PDF document text
    • http://fabrikando.com/cmsimple/images/file/36335468312.pdfIn PDF document text
    • http://yer-krasnodar.ru/ckfinder/userfiles/files/57249209315.pdfIn PDF document text
    • https://www.projectorrentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f52951107a---32361119301.pdfIn PDF document text
    • http://thehawthornnyc.com/wp-content/plugins/formcraft/file-upload/server/content/files/160832fd76086f---lafabewejinede.pdfIn PDF document text
    • http://finsura-lifedirect.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a72e73221a0---96504291329.pdfIn PDF document text
    • https://swimproject.eu/wp-content/plugins/super-forms/uploads/php/files/5ef5e1c9a328f33c9db7520936aba812/99512675153.pdfIn PDF document text
    • http://motocams.cz/ckfinder/userfiles/files/7356475393.pdfIn PDF document text
    • http://hodinovysoused.cz/upload/file/62666446340.pdfIn PDF document text
    • http://odnoklassniki-files.ru/images/uploads/files/sunavazemularixogakakisuz.pdfIn PDF document text
    • http://churchliferesources.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607372092641e---pidezodi.pdfIn PDF document text
    • http://195exim.com/datas/files/90632853562.pdfIn PDF document text
    • https://okazdedziecko.pl/_files/Media/file/75945269300.pdfIn PDF document text
    • http://www.bargiel.com.pl/ckfinder/userfiles/files/lifazenuwovepufusi.pdfIn PDF document text
    • http://allaboutdowney.com/userimages/mirisezoj.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=athens+metro+map+2018+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_off0000bb7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB7A 16332 bytes
SHA-256: f37b8726202d88fb5194a99a2bea31d6659832ed3b7d5b4921fca803cc40fe41
font_01_sfnt_off0000e5e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5E1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fdf8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDF8 11108 bytes
SHA-256: a72594669aa13bbcf40135349b9feaac14fa5a074d979f93b95a1ef8e2ab1b82