Malicious PDF — malware analysis report

Static analysis result for SHA-256 f58cc2c889da0832…

MALICIOUS

PDF

82.5 KB Created: 2021-08-24 06:49:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: f44dca22e5faf6e2077011fc0e722c01 SHA-1: 70336283abd53d1275f826e7696fc0f8a2cfb0c2 SHA-256: f58cc2c889da08326f188f41313b277dc90d2eabc2bfcfade6a5f2a04eeb25f2
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, a common technique for exploiting vulnerabilities or redirecting users. The presence of numerous external links, many pointing to compromised CMS uploads or disposable hosting, strongly suggests a phishing or malware distribution attempt. ClamAV detection as 'Pdf.Phishing.Trojan' further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://meyergarden.com/ckfinder/userfiles/files/xazafi.pdf In PDF document text
    • http://hydrogears.com/survey/userfiles/files/vutelixi.pdfIn PDF document text
    • http://fandimnarodaku.cz/upload/file/24665673197.pdfIn PDF document text
    • http://ameshamagazine.com/js/upload/files/67982592131.pdfIn PDF document text
    • https://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/16097e4078713d---lidukavogegududiruxexepo.pdfIn PDF document text
    • http://grossfamilyreunion.com/clients/0/00/00c8ca1d7e0432e0ca4c178cf0a97985/File/xeneporediga.pdfIn PDF document text
    • https://www.frankcapassoandsons.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2dd23c25f1---kerawod.pdfIn PDF document text
    • https://asaptransfers.co.uk/wp-content/plugins/super-forms/uploads/php/files/jcsd4eu8o80mhveekjtnelvis6/84794235935.pdfIn PDF document text
    • https://purebodycare.courses/wp-content/plugins/super-forms/uploads/php/files/sph7dt5jfr918sh3sokio68h7g/bebated.pdfIn PDF document text
    • https://taechoclub.com/FileData/ckfinder/files/20210730_80B3F648FB3EFA27.pdfIn PDF document text
    • https://slezanie.eu/userfiles/file/41897175994.pdfIn PDF document text
    • http://www.kickcommerce.com/userfiles/file/vovaraleza.pdfIn PDF document text
    • https://drrajanmahtani.com/userfiles/files/pekuvovenanosozuwabe.pdfIn PDF document text
    • https://homini.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca26ee373f---37790166438.pdfIn PDF document text
    • http://dgjst.com/upfile/file/kizorefidawoxivopi.pdfIn PDF document text
    • http://tandartsindex.nl/images/uploads/wulotinu.pdfIn PDF document text
    • http://myjobcareer.net/userfiles/file/2021062900301373499.pdfIn PDF document text
    • https://refour.eu/wp-content/plugins/super-forms/uploads/php/files/7f79ef23ee50731dfc46d6f4338cb5ab/puneterexapawa.pdfIn PDF document text
    • https://dondepodemosir.com/userfiles/file/78885429064.pdfIn PDF document text
    • http://atomiccm.com/userfiles/files/nekibotuxoxujuwuf.pdfIn PDF document text
    • http://nwatchonline.net/userfiles/file/75425442630.pdfIn PDF document text
    • https://www.dentaltaxpros.com/wp-content/plugins/super-forms/uploads/php/files/67e3e0f960f47dcee5f1f8397fe281b5/94594753606.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=good+riddles+with+their+answersPDF 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_off0000e0b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0B1 10468 bytes
SHA-256: 216205b309fa8d5ace5dc8de8963ac0b664253337cab6d306e7f47a15aaf15fc
font_01_sfnt_off0000f87c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF87C 17024 bytes
SHA-256: 06c425268127cf249cd8f0c8742b2a8b9bcdbb51d7fca258ea36c2b326f35743
font_02_sfnt_off000124c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124C0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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