Malicious PDF — malware analysis report

Static analysis result for SHA-256 94995d24accfc0f6…

MALICIOUS

PDF

75.2 KB Created: 2021-09-13 15:02:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 637713071da2890c65ec5d6a2a8b20f1 SHA-1: a782dafb696585feca3bc85841bb47931836e504 SHA-256: 94995d24accfc0f67ea3c9d890f3c00215f1f64b82f287aff6a91b7901322add
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm hosted on disposable domains, a common tactic for phishing or distributing further malware. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9908

Heuristics 6

  • 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.
  • 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://nuregio.de/wp-content/plugins/formcraft/file-upload/server/content/files/161323eb7283f7---namisinaxogonevexagef.pdf In PDF document text
    • http://perfect-gallery.com/userfiles/file/kisipiderapobonit.pdfIn PDF document text
    • https://vcubusinesssolutions.com/userfiles/file/31586624446.pdfIn PDF document text
    • http://sgd42.ru/userfiles/file/fomugevibarubabetaxin.pdfIn PDF document text
    • http://ph-easycome.com/userfiles/file/91118227095.pdfIn PDF document text
    • http://eko-uklid.com/files/file/bibutavuxu.pdfIn PDF document text
    • https://cantarefides.ro/admin/userfiles/file/96151759788.pdfIn PDF document text
    • http://ecilingirler.com/resimler/files/ronebakeradododajale.pdfIn PDF document text
    • http://slesnick.net/userfiles/files/41777724838.pdfIn PDF document text
    • https://datatech-int.com/userfiles/file/13673903216.pdfIn PDF document text
    • http://ambulatorioveterinarioilprato.eu/userfiles/files/6759788692.pdfIn PDF document text
    • https://cullinanconstruction.com/wp-content/plugins/super-forms/uploads/php/files/kvspnqdvssijv9rsmgb8u6g2f5/37050180529.pdfIn PDF document text
    • https://gilbertems.com/videos/file/kapazofi.pdfIn PDF document text
    • https://ciela13.leaddeehub.com/userfiles/files/sijakufudar.pdfIn PDF document text
    • https://flomogroup.com/upload/files/60570381110.pdfIn PDF document text
    • http://laptopplus.be/app/webroot/files/userfiles/files/xosegirexawekakubesowo.pdfIn PDF document text
    • https://lentes123.com/aym_image/files/97229271400.pdfIn PDF document text
    • https://glosunspa.com/wp-content/plugins/formcraft/file-upload/server/content/files/161381969d6312---45872733048.pdfIn PDF document text
    • https://hattoco.vn/images/ckeditor/files/mizurolop.pdfIn PDF document text
    • https://network-italia.it/file/siloviponugexef.pdfIn PDF document text
    • https://tatsolarlight.com/uploads/files/42708957238.pdfIn PDF document text
    • http://www.almansori-ye.com/almansorifiles/files/tagigez.pdfIn PDF document text
    • https://www.die-umzugsfabrik.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133ebcc86ad0---kufedaxovut.pdfIn PDF document text
    • http://kursadowicz.pl/Upload/file/wimafi.pdfIn PDF document text
    • http://foreverymuslim.net/home1/forevev3/public_html/foreverymuslim/upload/file/94927223738.pdfIn PDF document text
    • https://slide-bearing.com/d/files/nevunamefalasesixomatomo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=gaston+bachelard+pdfPDF link annotation
    • 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_off0000bde5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBDE5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d5f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5F7 18404 bytes
SHA-256: 05fa21986696b01dfadbe17388cbe02d62242a64e20011599c09139b301e0b4a
font_02_sfnt_off0001064e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1064E 10804 bytes
SHA-256: 4c3b8f00c40efb8bf226317860ef276e84f25e8d34a53d77ff662cfc770ee86f

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