Malicious PDF — malware analysis report

Static analysis result for SHA-256 895ab9f862b06c1b…

MALICIOUS

PDF

95.4 KB Created: 2021-07-28 15:01:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: db73e800640d4174e06db0f5863379b1 SHA-1: f8d6a4019cba8eff6a519c5d937d617dc272bca9 SHA-256: 895ab9f862b06c1b5d6e6698e42d7c11b4f36e184967c1b8b3b574638a6ccbb4
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a link farm with numerous URLs pointing to compromised WordPress sites and disposable hosting, likely intended to redirect users to malicious content. Embedded JavaScript was also detected, suggesting potential for further exploitation or obfuscation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9726

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://seattleteriyaki3.com/uploads/files/4078782063.pdf In PDF document text
    • https://atlanthealth.com/wp-content/plugins/super-forms/uploads/php/files/baef185d6fbeb7eebb34a005bd46acc4/39201671970.pdfIn PDF document text
    • https://cbolean.com/wp-content/plugins/super-forms/uploads/php/files/uhobjh74frh2kcmnk3ndbn93g3/55932281189.pdfIn PDF document text
    • http://sportsclinicwest.ie/media/contents/file/jejerorerenemosekas.pdfIn PDF document text
    • https://micast.de/wp-content/plugins/super-forms/uploads/php/files/ls77h05mvpqohcocut7nn55knq/60170326247.pdfIn PDF document text
    • http://ranjitabiswas.com/userfiles/files/ziboxugiji.pdfIn PDF document text
    • https://telewebmarketing.com/FCKeditor/file/gapikoropanulapif.pdfIn PDF document text
    • https://globportal.com/upload/userfiles/files/pizizi.pdfIn PDF document text
    • https://www.temsilcisitesi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079aa22ea9ff---rezixar.pdfIn PDF document text
    • http://belgium-ex.com/images/blog//file/66991274083.pdfIn PDF document text
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/a235e74b1aa94d88cdd05c47f84e0c5f/kojotosinetedibas.pdfIn PDF document text
    • http://kfnmdg.com/upfolder/e/files/20210605224525.pdfIn PDF document text
    • https://haps.company/wp-content/plugins/super-forms/uploads/php/files/53mlhrboh37h5v7qtmoflj68h5/77274952540.pdfIn PDF document text
    • https://www.themeshcowork.com/wp-content/plugins/super-forms/uploads/php/files/7511be2bc03b0caaab3c1f890f282efa/namixatu.pdfIn PDF document text
    • https://aquaprosmart.com/userfiles/files/78632786057.pdfIn PDF document text
    • https://glaze-metalart.com/upload/files/17466219733.pdfIn PDF document text
    • http://nnk.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160a1c0ee71de2---bowogomovi.pdfIn PDF document text
    • http://dangkyidol.com/wp-content/plugins/super-forms/uploads/php/files/ea6vj7rjmhbje76bb8oddufsaa/gurifog.pdfIn PDF document text
    • https://www.breastcancerfoundation.in/wp-content/plugins/super-forms/uploads/php/files/8ddd1c917cbfe4992178259ac297b92c/38806592583.pdfIn PDF document text
    • http://tanphatinst.com/vietkiendo/upload/file/96136111607.pdfIn PDF document text
    • https://aryaayur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608da999c6f7d---62102704378.pdfIn PDF document text
    • http://arserwood.com/js/fckeditor/editor/filemanager/connectors/php/connector.php/upfiles/file/210520005112534112gkhcw0.pdfIn PDF document text
    • http://www.colegiometa.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/16073e296e26f2---foregokosaw.pdfIn PDF document text
    • https://jamisonfurnace.ca/userfiles/files/moxuratibonavuxofimidip.pdfIn PDF document text
    • http://jplus-ag.com/upload/files/BodyFile__60E56E40D0AF1.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=k33+gaming+set+driverPDF link annotation
    • https://sharpspringwww.kinsta.cloud/wp-content/plugins/super-forms/uploads/php/files/a59f0eefb607bc4d749e0f8be51930b3/21265543357.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f33c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF33C 20600 bytes
SHA-256: 7fca9099314b0632e66e3397f3ee65df583b2867f6945a73e92305ba4f4b4c69
font_01_sfnt_off000127a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127A4 16296 bytes
SHA-256: 0f0a173b551409a6ae35c9b4291f189bc81ef4c6e16b1f14ae015ee675f28678
font_02_sfnt_off00013dd0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13DD0 10652 bytes
SHA-256: 05da84576c3b93daef6ef6e9e8bf1a85aee2a0ed0d5e74285b93c07e95f82958
font_03_sfnt_off00015605.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15605 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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