Malicious PDF — malware analysis report

Static analysis result for SHA-256 9eeae103266fa9ab…

MALICIOUS

PDF

91.8 KB Created: 2021-08-07 16:34:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 9a4464eecc36c184c0924f9d1b1482af SHA-1: 3fd5e5e8b97b6915bc00052cf92455d3096d6a41 SHA-256: 9eeae103266fa9ab173f4e349e6ba6577ca8708b1d52e9d6f92f020ded5eeead
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 numerous links pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users. The presence of a 'download button' heuristic further indicates a lure to click on these links, likely to download further malware or engage in phishing. No scripts were extracted, but the overall structure points to a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9913

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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 https://synerhu.ru/uplcv?utm_term=gta+6+apk+%2B+data+download+for+android PDF link annotation
    • http://vasilii-orlov.fun/wp-content/plugins/super-forms/uploads/php/files/e1096901bb714927fbfded6da79e2ceb/kefenirutamevut.pdfIn PDF document text
    • https://amatnieks.com/pictures/image/tewejefusopuzibidiriso.pdfIn PDF document text
    • https://www.apartamentselsllacs.com/wp-content/plugins/super-forms/uploads/php/files/kpda5ej0q26uogoltaf31nb0jm/29612569886.pdfIn PDF document text
    • https://archcosmeticstudio.com.au/wp-content/plugins/super-forms/uploads/php/files/cdda32ad5d6c88f3288d8f0949aa3f07/29131970762.pdfIn PDF document text
    • http://kaplanpm.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fe30939f655---sejidobozekezowexul.pdfIn PDF document text
    • https://www.cibaospalaser.com/wp-content/plugins/super-forms/uploads/php/files/akgsb0graqqermds2p85uo3t91/59070316989.pdfIn PDF document text
    • https://www.cibaospalaser.com/wp-content/plugins/super-forms/uploads/php/files/8536d47a48n7gaorf07c6ee720/21931265900.pdfIn PDF document text
    • http://romanakladatelstvi.cz/userfiles/file/lagexo.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4cc068a7f4---katalozojejider.pdfIn PDF document text
    • http://vonkoenigsmund.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606c7d46cd5a4---tijomadisabososijubikone.pdfIn PDF document text
    • https://greyquotient.com/wp-content/plugins/super-forms/uploads/php/files/a9b98a293cde7436f1269322ad861713/wobonolozoposoretovorav.pdfIn PDF document text
    • https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1e6ac2e566---43129988620.pdfIn PDF document text
    • http://greatnice.club/updatefiles/file/74615338943.pdfIn PDF document text
    • http://staging.impactredevelopment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608cc0c26bf9b---34808057205.pdfIn PDF document text
    • http://cukierniabrzezinski.pl/www/artizam/fck/file/rukigavunudikugatozibax.pdfIn PDF document text
    • http://cautrucpalang.vn/webroot/img/files/benur.pdfIn PDF document text
    • http://brodart01.com/wp-content/plugins/super-forms/uploads/php/files/6si4fjirlkg66kv8cjfov6h3m5/keguvoduwepupasise.pdfIn PDF document text
    • https://www.adler-leitishofen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160835a8ae6175---roragetezupofogitewelusil.pdfIn PDF document text
    • https://go2germany.ru/files/file/pijolixatodirirefiriwepa.pdfIn PDF document text
    • https://festivalecolo.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607f880c00213---xudazutatoz.pdfIn PDF document text
    • http://amuseonline.com/absite/userfiles/file/26226295368.pdfIn PDF document text
    • http://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e5c0a4a6684---talofik.pdfIn PDF document text
    • https://facades-et-traditions.com/actualites/file/buzakunekejowe.pdfIn PDF document text
    • http://nationshield.ae/userfiles/files/30049447745.pdfIn PDF document text
    • https://dotcomtravelegypt.com/userfiles/files/61064290663.pdfIn PDF document text
    • http://makaeximworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2258b3b20f---vazutixinibemizumiruniz.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010347.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10347 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011b59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B59 17424 bytes
SHA-256: 7c2a58e712d83fd23e484e0a1b96de9ba22fed2e6e43f2d114c1a70f3ff7296c
font_02_sfnt_off000148da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x148DA 10576 bytes
SHA-256: 8b4a23e78fdafc858625252d2880877cabcda5a8faf8e4228378f5fc5f774290

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