Malicious PDF — malware analysis report

Static analysis result for SHA-256 096c85133a7a2df5…

MALICIOUS

PDF

93.5 KB Created: 2021-07-07 09:57:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 0935a4fddc46f0d03792017e73c650d5 SHA-1: be447a0ce5431a969fea539d975f990b708dd7d8 SHA-256: 096c85133a7a2df50f0274555e0cb5b232b91e4809d2f247b619a5dc4dc41020
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a link farm pointing to multiple compromised WordPress sites, a common tactic for distributing malicious content or phishing lures. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were extracted, the structure and embedded URLs suggest a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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://www.hinogas.com/wp-content/plugins/super-forms/uploads/php/files/gc4j9583jv1i8efrlm140gnmg3/36991081388.pdf In PDF document text
    • http://eiak.org/upload/editor/files/28973981564.pdfIn PDF document text
    • https://aryaayur.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082632650def---78312788589.pdfIn PDF document text
    • https://mkting.com.co/wp-content/plugins/super-forms/uploads/php/files/7d626ccda89926b83870c950fa8c8fe2/36365529930.pdfIn PDF document text
    • http://serendipityorlando.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097e5b1887ca---35814153272.pdfIn PDF document text
    • http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f30769b970---valozubajulelaranirewu.pdfIn PDF document text
    • http://naasschoolofmotoring.com/fckeditor/userfiles/file/wevizigozamimuwapavu.pdfIn PDF document text
    • http://www.veronicaneal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/16073d76c946d7---73158972112.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/287a9482578681f71395632ee2fcf79b/vuzepopowudapajowuvoj.pdfIn PDF document text
    • https://fmpride.com/wp-content/plugins/super-forms/uploads/php/files/d6f71bba838d2574ff371a3b3e863784/72920806802.pdfIn PDF document text
    • http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ddc2331629---wowonefazewifamafus.pdfIn PDF document text
    • http://aiswaryamatrimonials.com/fck_uploads/file/66663018953.pdfIn PDF document text
    • http://dharmapremipariwar.org/userfiles/file/xigiloz.pdfIn PDF document text
    • https://www.accidentinjuryalbuquerque.com/wp-content/plugins/super-forms/uploads/php/files/1nr5t2stillbnc1dujsqg6q47j/26245038005.pdfIn PDF document text
    • https://playgametoday.ru/wp-content/plugins/super-forms/uploads/php/files/793d81c7a8df89593885b305e3899764/77500902560.pdfIn PDF document text
    • http://mijneigenlift.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160afd27dbdd9a---38148482092.pdfIn PDF document text
    • https://apoiotelecom.com/imagens/img_fckeditor/file/sexikipetar.pdfIn PDF document text
    • https://www.lightingdynamics.com/wp-content/plugins/super-forms/uploads/php/files/46e4298a3bc3bb11fd25062a4f348f79/mozokazalekuxifezagumogan.pdfIn PDF document text
    • http://www.skup.it/wp-content/plugins/formcraft/file-upload/server/content/files/1606d3b8107294---romemaxokekamako.pdfIn PDF document text
    • https://studiovizia.com/webroot/img/content/files/virep.pdfIn PDF document text
    • http://www.moyekolodin.com/files/14496981039.pdfIn PDF document text
    • http://fields-on-earth.com/86808352857.pdfIn PDF document text
    • https://topinsolventa.ro/userfiles/file/susapamavowonozifalasedo.pdfIn PDF document text
    • https://www.generalutilities.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a14439424b---ramepowesoredu.pdfIn PDF document text
    • http://brandnewgoods.net/userfiles/file/kapowugudonomasagegos.pdfIn PDF document text
    • http://jshtextile.com/UserFiles/file///nikaxolenol.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=thumb+in+palm+deformityPDF 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_off00010b33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B33 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001234a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1234A 10912 bytes
SHA-256: aca979687e66dbf37e3d7754610c974cf8fb641107423b169783e085194f8b4e
font_02_sfnt_off00013c0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C0B 16708 bytes
SHA-256: 32ce700a7b48f835dd03499859d466f8c9e26a6d8a58ca65448c8dd5c28b44c3