Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e9db25cdfd0f6ee…

MALICIOUS

PDF

73.3 KB Created: 2021-09-22 13:07:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 7559e60339def14b5110e949a7b37558 SHA-1: 7398d784f8d1c182801e8803b03502e04b3e2efa SHA-256: 9e9db25cdfd0f6ee53e6d76c1c01c2787b24760fd81a860a150b0209383411b2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, with multiple URLs pointing to compromised WordPress upload directories. These links likely serve as a distribution point for further malicious content or phishing lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c918550a7d---83257910676.pdf In PDF document text
    • http://debten.net/UserFiles/File/mubosez.pdfIn PDF document text
    • https://anhhuynoithat.com/asset/files/17288387887.pdfIn PDF document text
    • http://quatanggiabao.com/images/uploads/files/pevarusokeperig.pdfIn PDF document text
    • https://sitycare.com/FCK-UserFiles/files/wadujopitugawumam.pdfIn PDF document text
    • http://onlinetalk.jp/app/webroot/img/fckfiles/file/fofozigejolirageganebu.pdfIn PDF document text
    • http://gayaarchi.com/userfiles/file/20210921024757.pdfIn PDF document text
    • https://tabularasa.lv/sites/tabularasa/uploads/documents/files/fogozunijukuzoreresuzam.pdfIn PDF document text
    • http://www.slappedtogether.com/editoruploadfiles/file/24338802519.pdfIn PDF document text
    • http://emanuelarombiarchitetto.eu/userfiles/files/77558996865.pdfIn PDF document text
    • http://locthanhroyal.com/upload/files/bogigepow.pdfIn PDF document text
    • https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/161375a76ba8ad---47669746766.pdfIn PDF document text
    • https://superpackeg.com/userfiles/file/xeravejavax.pdfIn PDF document text
    • https://harpethvalleyhealth.com/wp-content/plugins/super-forms/uploads/php/files/b2c9b4ad63ff00633b239e546d5037f8/53190968497.pdfIn PDF document text
    • https://atlaskvartir.ua/data/uploads/files/60335378397.pdfIn PDF document text
    • https://chambredhotes-savoie.com/ckfinder/userfiles/files/salijejobumobovuz.pdfIn PDF document text
    • http://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131829294f68---vomipesedupetulukidej.pdfIn PDF document text
    • http://elskenecologie.nl/files/32943692324.pdfIn PDF document text
    • http://hattingtoemrerogsnedker.dk/userfiles/file/xusujerovimuzelejijuguk.pdfIn PDF document text
    • http://sumisaedu.com/FileData/ckfinder/files/20210908_65788D69CCCBA6E9.pdfIn PDF document text
    • http://ggmtc.net/userfiles/files/65574492793.pdfIn PDF document text
    • https://onecre.com/images/content/files/7861725603.pdfIn PDF document text
    • http://msmzizkov.cz/data/dokumenty/79539474411.pdfIn PDF document text
    • https://elemental-ia.com/userfiles/file/65805804195.pdfIn PDF document text
    • http://granitemountainranch.net/userimages/rotibilasul.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=555+meaning+doreen+virtuePDF 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_off0000bec2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBEC2 16056 bytes
SHA-256: 25113f291469dc29d3c81c3c369053eaf6ef700b382fd755eba9bf5a4c4fcb3e
font_01_sfnt_off0000e7ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7AC 10580 bytes
SHA-256: f29359ee9adc0d226a86f24020fd0ff73d25073c54fd8d773435be5293ab0160
font_02_sfnt_off0000ff93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF93 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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