Malicious PDF — malware analysis report

Static analysis result for SHA-256 75677229b77acff9…

MALICIOUS

PDF

84.5 KB Created: 2021-07-06 01:03:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 54e33155f495b203a5884aece32b44f8 SHA-1: eede430ec53bab329374eb6564717072bf216751 SHA-256: 75677229b77acff9624ae201c6325e09ca6cce5a213fc017830cc6a870126244
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file contains a large number of links, many of which point to other PDF files hosted on compromised websites. The ML classifier and ClamAV detection indicate malicious intent, likely related to phishing or SEO spam. The embedded links suggest an attempt to direct users to malicious content or to manipulate search engine rankings.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://agenziaimmobiliarecannavo.eu/userfiles/files/welexezevorofaraz.pdf In PDF document text
    • http://sdds.be/userfiles/file/xifovad.pdfIn PDF document text
    • https://www.booster-p.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095e08736b66---fogumovogupo.pdfIn PDF document text
    • https://advancedbusiness.co/wp-content/plugins/super-forms/uploads/php/files/4f392f4c3fb164975feda8660b72da0e/820401025.pdfIn PDF document text
    • https://bya-ingenieria.com/ckfinder/userfiles/files/nukaluwemozegoko.pdfIn PDF document text
    • https://georgiamusicpartners.org/wp-content/plugins/super-forms/uploads/php/files/939f172e6e418e66eda544c7db3bff23/puvuselovawegokeme.pdfIn PDF document text
    • https://jgmurphy.com/wp-content/plugins/super-forms/uploads/php/files/a2f6ec3cd4d14ad830efaefbc3e25ddc/90346969917.pdfIn PDF document text
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/1607f885aba621---kitogovira.pdfIn PDF document text
    • https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090f425c14a5---budazorugozunorujenafepep.pdfIn PDF document text
    • http://beerskiboot.com/img/upload/file/xivedodisenujaratena.pdfIn PDF document text
    • https://mebelpozakazu.ru/wp-content/plugins/super-forms/uploads/php/files/52eee2f8d3020c2fd8e2ae8b2a4cea25/79620336641.pdfIn PDF document text
    • http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160abd9280e8be---67156902652.pdfIn PDF document text
    • http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160752336de1c5---jalizuwebogavagelegatem.pdfIn PDF document text
    • https://lacecinella.com/writable/public/userfiles/file/nelegegugebapidofapajuwi.pdfIn PDF document text
    • http://africa-emergence2019.com/userfiles/file/javimepigatofebekuwu.pdfIn PDF document text
    • http://begemot-rus.com/uploadfiles/file/2021061405022773499.pdfIn PDF document text
    • http://alternativefitness.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16078e32fc0d3b---japativatodogifo.pdfIn PDF document text
    • https://na-nule.ru/wp-content/plugins/super-forms/uploads/php/files/0nea3tphhn6i9ancaihv35tuj3/xarope.pdfIn PDF document text
    • http://deurwater.com/wp-content/plugins/formcraft/file-upload/server/content/files/160854f5d057c5---26899265190.pdfIn PDF document text
    • http://bellsazshihtzu.com/clients/878694/File/21953035935.pdfIn PDF document text
    • http://drironcat.com/images/file/69646139868.pdfIn PDF document text
    • http://nprofit.hk/userfiles/92237445045.pdfIn PDF document text
    • https://yarsan.ru/wp-content/plugins/super-forms/uploads/php/files/9bdddee4a4412546e6aedaddc6ae22ff/5750380976.pdfIn PDF document text
    • https://powermailer.in/userfiles/file/fikebizogepo.pdfIn PDF document text
    • http://stuarteisbrucklaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/57501312596.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=66+celsius+to+fPDF 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_off0000ee97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE97 10136 bytes
SHA-256: 16d107cac01ad8956f607a74627ded39d80771714820285938806a0c703f541e
font_01_sfnt_off00010560.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10560 15616 bytes
SHA-256: 6c6e0e716df9f969a2a849838048830392c2cc138a92358c1782c67306112e73
font_02_sfnt_off00012d07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D07 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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