Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6da1aa60bb64991…

MALICIOUS

PDF

84.2 KB Created: 2021-08-13 23:52:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 7a9cd71f22fadf6a59705b61d3707787 SHA-1: 0e0813c401c68bccc5c35a8332d6db9e8d6f03d9 SHA-256: c6da1aa60bb64991610a82563dfce0ef1043c1261b14b2c8f33bfc7bbc4764c0
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The presence of numerous embedded URLs pointing to compromised websites and a visual download button lure suggests a phishing or malware distribution attempt. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://wastran.ru/uplcv?utm_term=blackmart+alpha+download+link PDF link annotation
    • http://sarahscupcakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160769e7234950---fikimezijasipok.pdfIn PDF document text
    • http://alexanderjamesbackcatalogue.com/userfiles/file/37723332523.pdfIn PDF document text
    • https://www.gs-gleichmann.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606f375b86e5d---52252740347.pdfIn PDF document text
    • http://standardamulet.com/files/files/10475431360.pdfIn PDF document text
    • http://ros-grad.ru/fck_editor_files/files/jajipiwuxitusisasidodabar.pdfIn PDF document text
    • http://agnieszkapawlik.com/userfiles/file/luxedokuzinopozad.pdfIn PDF document text
    • http://bmsorganica.com/userfiles/file/sovetikunabovusukurubaji.pdfIn PDF document text
    • https://techson-cctv.com/upload/file/birujivimaved.pdfIn PDF document text
    • http://www.fullertherapy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c902b71d72---nagipomu.pdfIn PDF document text
    • https://spencershaulageltd.co.uk/wp-content/plugins/super-forms/uploads/php/files/3c25045da820a8f03de677c4c7bdfb12/33039700025.pdfIn PDF document text
    • https://joepromenshealth.com/wp-content/plugins/super-forms/uploads/php/files/ec937b01798dd29f048fdf013b9720a6/58573224086.pdfIn PDF document text
    • https://nakipoglugroup.com/upload/ckfinder/files/24551445794.pdfIn PDF document text
    • http://aj-logistics.com/stock/userfiles/file/5806620685.pdfIn PDF document text
    • http://www.verneteco.com/ckfinder/userfiles/files/pepemevuzifilazozezasid.pdfIn PDF document text
    • https://nscs.org/wp-content/plugins/super-forms/uploads/php/files/225b9a70495884c2e172202132d26984/rakasarun.pdfIn PDF document text
    • http://portalcom-b2b.es/img/user///file/_0047841001620177894.pdfIn PDF document text
    • https://noks.cz/wp-content/plugins/formcraft/file-upload/server/content/files/1609cc74db5ac5---42098479692.pdfIn PDF document text
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/d55403bd650133a51721073dd1e03205/69166132211.pdfIn PDF document text
    • http://aire-limpio.com/img/editor/file/51738953269.pdfIn PDF document text
    • http://www.eflox.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608bbdd420724---84255459884.pdfIn PDF document text
    • https://parisautotravel.com/wp-content/plugins/super-forms/uploads/php/files/lvnl2qo1cci3jbf6gcajdaod06/xexifetom.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_off0000e77e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE77E 10708 bytes
SHA-256: 7ca88c7264a8f4e46653172910108978a4fa90404d11aefff90c459477ebffa6
font_01_sfnt_off0000fff1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFF1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011803.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11803 16708 bytes
SHA-256: ab5ff96da5f814e543c6801093c79501e6e76282fe1d02d5155e97b53842f369

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