Malicious PDF — malware analysis report

Static analysis result for SHA-256 d566a6e9c12bb7c9…

MALICIOUS

PDF

71.2 KB Created: 2021-09-25 13:11:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: d67a8fd97a54ee4c31d46e67008d5453 SHA-1: e1c85ba4fcf8b6f3675b0bc62f3ba415030009ab SHA-256: d566a6e9c12bb7c980d1e1f7a5ad9a79c41507426f1692e2be9e4d50b49dda52
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many hosted on compromised or disposable domains, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9885

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://infrive.ru/uplcv?utm_term=dragon+ball+super+download+for+ppsspp PDF link annotation
    • https://standsimulator.com/ckfinder/userfiles/files/5931109209.pdfIn PDF document text
    • http://www.vivelamusica.es/wp-content/plugins/formcraft/file-upload/server/content/files/16140eaa46f61e---jesapofu.pdfIn PDF document text
    • http://dom-nenilovo.ru/wp-content/plugins/super-forms/uploads/php/files/7e238a44f42bd9083bbf2693dfc685a8/35062422519.pdfIn PDF document text
    • https://mbzl-pro.xyz/web/img/podborky/files/kojolosekogepem.pdfIn PDF document text
    • http://korealabels.com/ckfinder/userfiles/files/pixufenaxotesorerodu.pdfIn PDF document text
    • http://topup-fight.com/ckfinder/userfiles/files/38116298767.pdfIn PDF document text
    • http://www.musicmaestrodiscos.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16142208855169---71177563626.pdfIn PDF document text
    • http://5mal4.de/moneyvidya/web/images/userfiles/file/kedofifax.pdfIn PDF document text
    • http://smelawservice.com/file_media/file_image/file/ropalop.pdfIn PDF document text
    • http://airsoft1.ro/files/file/90458717693.pdfIn PDF document text
    • http://www.ramseier-appenzell.ch/elrada/js/ckfinder/userfiles/files/55247552416.pdfIn PDF document text
    • http://biosurfest.com/userfiles/files/77986016323.pdfIn PDF document text
    • https://hamayeshniroo.com/shop/file/katofepeg.pdfIn PDF document text
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613fe704a92d2---bubumetetokesoj.pdfIn PDF document text
    • http://sarkanyhajo.hu/files/file/mitumetimabozotememevitav.pdfIn PDF document text
    • http://pferdplus.at/sites/pferdplus.at/files/file/41957380143.pdfIn PDF document text
    • https://philly.drinkpoint.com/uploads/files/rumumelelakuzawulofimezow.pdfIn PDF document text
    • http://ideatity.com/ckfinder/userfiles/files/22185343230.pdfIn PDF document text
    • https://holocaustresearch.pl/nowy/photo/file/suwaveruxomitimapapufo.pdfIn PDF document text
    • https://turdv.ru/SITE/files/editor/file/xamor.pdfIn PDF document text
    • https://www.profiemg.cz/upload/ck/files/jovavif.pdfIn PDF document text
    • https://www.institutvzdelavani.cz/files/kalot.pdfIn PDF document text
    • http://piannocreativo.com/js/new/fckeditor/userfiles/file/21380824583.pdfIn PDF document text
    • https://highfieldhousehotel.net/nbloom/fckuploads/file/gogaliduret.pdfIn PDF document text
    • http://abwmechanicsville.com/uploads/files/zokizinagikuwof.pdfIn PDF document text
    • https://byocamacho.com/ckfinder/userfiles/files/39670970068.pdfIn PDF document text
    • http://tivatijapan.com/uploads/userfiles/file/52444423711.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_off0000b4f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB4F8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cd0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD0A 16260 bytes
SHA-256: 6d16384f57379982f07ed2810e8469397fe73dac535e7c213df660ae6647d1dd
font_02_sfnt_off0000f67f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF67F 10808 bytes
SHA-256: 745e26a7ed1440eff85b31fc762adfaa255fbbdf095db69e746b68e4a0c9809d