Malicious PDF — malware analysis report

Static analysis result for SHA-256 0311f068c0dc3dcf…

MALICIOUS

PDF

81.4 KB Created: 2021-09-16 09:44:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 9afccd39147fde3461039f9d41334ed4 SHA-1: a2c7b47beb4c8187e39c3f37a0370ce072d0f0ab SHA-256: 0311f068c0dc3dcfcac2a0b76fc31f9ddaa0c7ecc31d3fa65586e9ed6cb7d36c
164 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, indicating a high likelihood of malicious intent. The presence of numerous links pointing to compromised CMS upload storage and disposable hosting, combined with a heuristic for a download button lure, suggests a phishing or malware distribution scheme. The file's structure and embedded URLs are consistent with a campaign aiming to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://medvor.ru/uplcv?utm_term=super+mario+64+ds+nintendo+ds+rom PDF link annotation
    • https://www.avenueroadadvertising.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141a47ea20bf---26050011316.pdfIn PDF document text
    • http://didaconcept.com/admin/fckeditor/file/30141725766.pdfIn PDF document text
    • https://rtvpuls.com/ckfinder/userfiles/files/93021821792.pdfIn PDF document text
    • http://hzzxtl.com/UploadFile/file/20210901100351701.pdfIn PDF document text
    • https://4wheelchile.cl/admin/uploads/file/41758522669.pdfIn PDF document text
    • http://purplebyanki-com.bvirani.com/ckfinder/userfiles/files/kigiwazilusimija.pdfIn PDF document text
    • http://vanharteyoga.nl/uploads/files/xidumivemumoropevepafu.pdfIn PDF document text
    • http://rqconsultores.com/userfiles/file/84749437750.pdfIn PDF document text
    • https://daulte.com/ckfinder/userfiles/files/xepofa.pdfIn PDF document text
    • https://blsautomation.com/ckfinder/userfiles/files/1411378209.pdfIn PDF document text
    • https://parisautotravel.com/wp-content/plugins/super-forms/uploads/php/files/qtn84a1vrt58n0cvfc3ehe23s3/22826456592.pdfIn PDF document text
    • https://qualityroofinnandsuites.com/nbloom/fckuploads/file/kevumevazawikego.pdfIn PDF document text
    • http://ibarugi.com/fckeditor/userfiles/file/daponuw.pdfIn PDF document text
    • http://www.cuadernos.in/wp-content/plugins/formcraft/file-upload/server/content/files/1613df97747379---goxopijorelezofipisak.pdfIn PDF document text
    • https://techinnsrl.com/writable/public/userfiles/file/kagaxuxavisevulo.pdfIn PDF document text
    • http://capriololaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/64971354745.pdfIn PDF document text
    • https://mahae.hu/files/files/6149846783.pdfIn PDF document text
    • http://speckletrack.com/update/editor/file/wonexok.pdfIn PDF document text
    • http://lamardaegu.com/upfile/user/file/niveruj.pdfIn PDF document text
    • http://worthingtonpark101.com/userimages/norotelunogurijav.pdfIn PDF document text
    • https://saftanton.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1613a3ddc0b88b---73853917645.pdfIn PDF document text
    • https://samowar.me/upload/file/49530541178.pdfIn PDF document text
    • https://designmaster.in/scgtest/eec-new/codelibrary/ckeditor/ckfinder/userfiles/files/jebavigixi.pdfIn PDF document text
    • http://impactpluslearning.com/ckfinder/userfiles/files/lozuloloj.pdfIn PDF document text
    • https://chocoinmobiliario.com/wp-content/plugins/super-forms/uploads/php/files/13ac424347f11befc6c1a78f382cacab/7970472532.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_off0000d36b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD36B 18552 bytes
SHA-256: 1a2214ee934b4a58d2f3c2aa287ffd8ddfa4f700bca3faad0439a79e85748756
font_01_sfnt_off0001045a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1045A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011c71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C71 10928 bytes
SHA-256: d33bcd223f16d4dccea9cb84a0b5c28bed2b2fe6dccac93da73e9eeb70d19e34

Open this report in the interactive analyzer, or submit your own file for analysis.