Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae2fc494b212cf4d…

MALICIOUS

PDF

89.0 KB Created: 2021-07-18 16:22:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 1833b2d4f9ab6ca430e6c695c4ed728e SHA-1: 155e151db2760a85dbb50685f69c1fd8504d83e4 SHA-256: ae2fc494b212cf4d9a3b1ab4d605446a7b0f5042da635c73cc90f34d77e30fd8
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was identified as malicious by a machine learning classifier and ClamAV. It functions as a link farm, containing numerous URLs pointing to compromised WordPress uploads and other disposable hosting sites. The presence of these links suggests an attempt to redirect users to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://m-camper.ru/ckfinder/userfiles/files/nosabafu.pdf In PDF document text
    • http://falerisztika.hu/tmp/39955042420.pdfIn PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/7g7h9c59i8vn11tn8thoo4ue97/dimabezuranesav.pdfIn PDF document text
    • http://www.prunay-en-yvelines.fr/ckfinder/userfiles/files/sinamobi.pdfIn PDF document text
    • http://kotolantopeni.cz/file/peteko.pdfIn PDF document text
    • https://www.brightfieldbusinesshub.co.uk/wp-content/plugins/super-forms/uploads/php/files/glg6v03knq1nelh7fj9vu9fnnk/timelumafilakazodetawi.pdfIn PDF document text
    • http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1606c95af93e4e---zitonumulebane.pdfIn PDF document text
    • http://motocams.cz/ckfinder/userfiles/files/73932909590.pdfIn PDF document text
    • https://monacollection.ua/wp-content/plugins/super-forms/uploads/php/files/501d662be9c33ab80ebec4d061b30784/lagelixipuxedemate.pdfIn PDF document text
    • https://travels-ukraine.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072cac21f634---57985156147.pdfIn PDF document text
    • https://aquatrustfina.com/userfiles/file/97804619099.pdfIn PDF document text
    • http://oreade-breche.fr/userfiles/file/76945672806.pdfIn PDF document text
    • http://modelkyujin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f2d48b764b---38563388053.pdfIn PDF document text
    • http://livestreaming.group/wp-content/plugins/super-forms/uploads/php/files/lmtnfak75duhhfl0v5dn8ast4pmtgae3/93674557802.pdfIn PDF document text
    • http://serendipityorlando.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083c01a7e1ac---81386556313.pdfIn PDF document text
    • https://rosewoodcity.org/nbloom/fckuploads/file/lumoxus.pdfIn PDF document text
    • https://vakukh.ru/wp-content/plugins/super-forms/uploads/php/files/1236b2e67cd2000ca6c589caad2a6ae2/31845662516.pdfIn PDF document text
    • https://www.rydalmereprestige.com.au/wp-content/plugins/super-forms/uploads/php/files/ds76sccvlnrd2ob2j5dpibef7e/mujuvazatuguzokejulonagen.pdfIn PDF document text
    • http://www.vivelamusica.es/wp-content/plugins/formcraft/file-upload/server/content/files/160a8d02ed4c67---mujavetonavijinogadud.pdfIn PDF document text
    • http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606eed979a8a0---7075150114.pdfIn PDF document text
    • http://headrepublic.pl/images/files/1353076881.pdfIn PDF document text
    • https://www.vibrationmonitoring.asia/wp-content/plugins/formcraft/file-upload/server/content/files/160b65e643efb2---61273242805.pdfIn PDF document text
    • https://jagominum.com/contents//files/46852981332.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=diamond+app+for+free+firePDF 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_off0000f990.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF990 17748 bytes
SHA-256: b54375198d95e3cbe2814445b0398a9c8c91f408515943ad826ce6a505453bda
font_01_sfnt_off00012781.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12781 10348 bytes
SHA-256: 65a17779c49f9ccf3da4c4e8f9fd70ee4eef35baedd96364af1d534bcff40bdc
font_02_sfnt_off00013ebb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13EBB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1