Malicious PDF — malware analysis report

Static analysis result for SHA-256 68340d56eed09a8d…

MALICIOUS

PDF

92.4 KB Created: 2021-07-15 21:41:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: d412883d179145c23199b8b5469472a5 SHA-1: 9793441a2d1506de9a445472e3c21d7ef162ba7b SHA-256: 68340d56eed09a8d72eed09843c784090551669c8a9171d2b61aa6ef37892c56
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many pointing to compromised WordPress sites and disposable domains, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or distributing further malware. No scripts were extracted, but the structure and URL patterns are consistent with a malicious PDF dropper.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 6

  • 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.
  • 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://nomylo.ru/uplcv?utm_term=doing+100+crunches+a+day PDF link annotation
    • https://member-amz-seller-system.de/wp-content/plugins/super-forms/uploads/php/files/7bd7e3f0cd1633a437cac222999a01b6/87343276758.pdfIn PDF document text
    • https://leicht-spb.ru/wp-content/plugins/super-forms/uploads/php/files/701132149bec86a487f6111e8fbfaebc/3483382113.pdfIn PDF document text
    • http://jyjwqj.com/uploadfile/file///2021062819224699.pdfIn PDF document text
    • https://www.napariverinn.com/wp-content/plugins/super-forms/uploads/php/files/e512af4b5985cd2bbda7fbbd371d44f8/gumovufofozavimemopadazeg.pdfIn PDF document text
    • https://gservicepz.com/wp-content/plugins/super-forms/uploads/php/files/8f968c36ce09242dea33ef5ac83da16b/fufij.pdfIn PDF document text
    • https://hagabb.ro/ckfinder/userfiles/files/gefokajokul.pdfIn PDF document text
    • http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/16087b8f18ad49---kewunirobiramarixes.pdfIn PDF document text
    • https://www.neosynapses.com/wp-content/plugins/super-forms/uploads/php/files/66sj73tfg44vic0hfpv1r7jamc/29097850007.pdfIn PDF document text
    • https://www.webplease.it/wp-content/plugins/super-forms/uploads/php/files/mjoq8st7bv6odvoatkitms76mn/2527045494.pdfIn PDF document text
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c23542860a3---69140584636.pdfIn PDF document text
    • http://elitaliaweb.it/upload/file/40235223248.pdfIn PDF document text
    • http://csc0532.com/userfiles/file/20210626165045_4kjrkg.pdfIn PDF document text
    • http://lucann.com/Upload/file/67965980281.pdfIn PDF document text
    • https://asiarsolutions.com/userfiles/file/42585944941.pdfIn PDF document text
    • http://a1-automotivegroup.com/upload/files/gimimusafazedekuzag.pdfIn PDF document text
    • http://unicorn-furnitures.com/d/files/195901272.pdfIn PDF document text
    • https://umartravel.com/files/boboxodijodofeponuweni.pdfIn PDF document text
    • https://www.kunapak.com/wp-content/plugins/super-forms/uploads/php/files/7epmvsaajbf3gtdh6dm5ie8n1p/8121931782.pdfIn PDF document text
    • http://elmiraclassiccountry.com/wp-content/plugins/super-forms/uploads/php/files/oicbndh85abr5tbn7sqan0tik7/2183094842.pdfIn PDF document text
    • http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd2f13538a6---97032135329.pdfIn PDF document text
    • https://batikatravels.com/userfiles/file/96027150247.pdfIn PDF document text
    • https://rfcorporation.net/wp-content/plugins/super-forms/uploads/php/files/1183888c5edf2424ca7c2167a72db84c/76012413420.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_off0001065b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1065B 10896 bytes
SHA-256: 75b1ab49bb42ec24fb8d01b18c918bcc635c7134d30e06aa451e72d690369a28
font_01_sfnt_off00011f5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F5B 16960 bytes
SHA-256: 439a3e58ce99a5e51f871badc5207f3af94417f33419aa82df47141f457a89e8
font_02_sfnt_off00014b45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14B45 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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