Malicious PDF — malware analysis report

Static analysis result for SHA-256 1bbaf46aa2197cec…

MALICIOUS

PDF

74.8 KB Created: 2021-09-02 06:00:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: ca7b3e06c12881fb8f8eb2110b420a2b SHA-1: e06b52b85c5e4ce3735017ade3dc98b994aa356f SHA-256: 1bbaf46aa2197ceca0678adaab685b00e3cc7058b58ab531a441d2ab49a18323
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. While no scripts were explicitly extracted, the PDF structure and URL patterns indicate a phishing or redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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 http://zgic.ru/!upload/files/lezosareja.pdf In PDF document text
    • http://24cvety.ru/upload/files/lafudetikata.pdfIn PDF document text
    • http://salkim.com/userfiles/file/saxikabezemugemeniwami.pdfIn PDF document text
    • http://vet-arrighicolangelicristilli.eu/userfiles/files/79966632730.pdfIn PDF document text
    • http://salonlomi.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16072306365a0d---jonejiwexageju.pdfIn PDF document text
    • https://www.sir.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160f068f11d35e---jonemapotapoxo.pdfIn PDF document text
    • https://www.temsilcisitesi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d402cdeae3---demolalitigoxawelimov.pdfIn PDF document text
    • https://magnettoptan.com/upload/ckfinder/files/42059739361.pdfIn PDF document text
    • http://www.barankayalar.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160a4d1779b3d1---36942208780.pdfIn PDF document text
    • http://webursitet.org/Files/file/vunirefimafarulewake.pdfIn PDF document text
    • https://lightspec.com/wp-content/plugins/super-forms/uploads/php/files/d86a7011276e6d4685d79b0d4ce651e7/gakupudirunuxoja.pdfIn PDF document text
    • http://www.holderit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba4a92b83b5---54346237274.pdfIn PDF document text
    • http://sarahscupcakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160946d5b285ba---topurofedop.pdfIn PDF document text
    • https://kingwrapcarspa.com/upload/files/vofofobawonu.pdfIn PDF document text
    • http://around-sicily.net/userfiles/file/59554204126.pdfIn PDF document text
    • http://vom-ragnaroek.de/uploads/file/zokugikowizakatorurakeju.pdfIn PDF document text
    • http://jkohut.pl/file/67589194163.pdfIn PDF document text
    • https://tatsolarlight.com/uploads/files/6034335007.pdfIn PDF document text
    • https://csam-villepinte.org/uploads/images/file/68175698871.pdfIn PDF document text
    • https://www.democratum.com/wp-content/plugins/super-forms/uploads/php/files/a8b5de0091d669c4ad14c2dcd1b003b1/7392133244.pdfIn PDF document text
    • https://artasedanasingaraja.com/uploadfck/file/dudopawimimaxedujuz.pdfIn PDF document text
    • http://finance-bulldog.cz/UserFiles/File/74076628298.pdfIn PDF document text
    • http://vimar.ua/userfiles/files/kaloje.pdfIn PDF document text
    • https://servauto.fr/img/user/file/pofara.pdfIn PDF document text
    • http://thaiboxes.com/piceditor/file/66930337172.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=notes+of+chapter+3+of+biology+class+12PDF 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_off0000c152.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC152 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d964.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD964 16076 bytes
SHA-256: bce87677e0de2979987c995ac0ced2f90ff166e191918ec16c958c80c9146f4f
font_02_sfnt_off000102a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102A1 11228 bytes
SHA-256: f336871c52d6c2723694c3670658b93f119581b89b77ebd92487aa0c3bb079e4

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