Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7ca7736df92788f…

MALICIOUS

PDF

79.8 KB Created: 2021-07-26 15:12:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 8eafbce9121fc283f2954952a09918da SHA-1: 90aec46c4ea34f296f6637fa06446a220657cde2 SHA-256: c7ca7736df92788fc3c60435f2b449e71f60600f3d0d09bb487e8e183a2ddabb
176 Risk Score

Malware Insights

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

The PDF document was flagged by a machine learning classifier and ClamAV as malicious, exhibiting characteristics of a phishing or callback scam. It contains numerous links to potentially compromised websites, suggesting an attempt to host malicious content or redirect users. The heuristic 'SE_CALLBACK_LURE' specifically indicates the document is designed to trick users into calling a phone number under the guise of a security or billing issue.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://mispuntossaga.com/campannas/file/29998546209.pdf In PDF document text
    • http://koovappadyscb.com/ckfinder/userfiles/files/razil.pdfIn PDF document text
    • https://www.hospedeagora.com.br/wp-content/plugins/super-forms/uploads/php/files/024rh93ckus61tp46omb1d5hpt/doxupimilefef.pdfIn PDF document text
    • http://alphabodysupplements.com/newerac2c/userfiles/file/26050511493.pdfIn PDF document text
    • https://markzone.az/wp-content/plugins/super-forms/uploads/php/files/q9jmplbk00vba4hbjuji7obqbn/73241371143.pdfIn PDF document text
    • http://skiflogistics.ru/userfiles/file/34422988985.pdfIn PDF document text
    • https://immo-macedo.lu/userfiles/files/77802002547.pdfIn PDF document text
    • http://www.fullmooneye.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c25176d65b---vinewo.pdfIn PDF document text
    • https://yourtuscanyguide.com/wp-content/plugins/super-forms/uploads/php/files/174849t2f45hvv3ssgj8fnjqh5/dakigolufivepinivukinisem.pdfIn PDF document text
    • https://samsungdvmklima.com/upload/ckfinder/files/60759277501.pdfIn PDF document text
    • https://backcountryplayground.com/wp-content/plugins/super-forms/uploads/php/files/28566b283b6eeb27d97eb56e61b6ec81/folowu.pdfIn PDF document text
    • https://bizdrive.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/1606fa5582d8cf---zapunip.pdfIn PDF document text
    • http://attep.com/home/sandbox/domains/heekee.com.hk/public_html/ckfinder/userfiles/files/16700766441.pdfIn PDF document text
    • http://autoscuolemontagna.it/userfiles/files/vafitedozemalidaxoze.pdfIn PDF document text
    • https://www.bocamvigliesrooms.com/wp-content/plugins/super-forms/uploads/php/files/1cf49c379e979d8bd6b24bde0d6136e9/febuxafaveran.pdfIn PDF document text
    • https://www.isnb.co.uk/wp-content/plugins/super-forms/uploads/php/files/ffb4c7b902c0e996e36a9a54e6a20383/16596372316.pdfIn PDF document text
    • https://tomas-music.com/contents//files/5404211394.pdfIn PDF document text
    • http://cgt-fo-csc.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160fab26e2f2a8---98979635893.pdfIn PDF document text
    • https://siyata.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160b2c12c7c847---juzek.pdfIn PDF document text
    • http://jyjwqj.com/uploadfile/file///2021052514165276.pdfIn PDF document text
    • http://hrjok.com/uploadfile/file/99061158404.pdfIn PDF document text
    • http://harringtonandlombardi.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/41381092274.pdfIn PDF document text
    • http://merlegdoktor.hu/tmp/lekagez.pdfIn PDF document text
    • https://arab-hams.com/Ups/files/ruxonimokufebovulazobunix.pdfIn PDF document text
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/b06386f7e38ffabff5df272f494d65b4/5597409575.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=how+to+read+a+trane+furnace+serial+numberPDF 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_off0000d4b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4B7 16268 bytes
SHA-256: e6ddd9ec75b1968ed74ae696c00fbc89f3e899b759e9d21dbef119b248e4eef8
font_01_sfnt_off0000feb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEB2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000116c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116C9 10952 bytes
SHA-256: 2adba195c50898f151e7e72343faa4b8d39cbde9458d9b80d6d44277e2922e32

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