Malicious PDF — malware analysis report

Static analysis result for SHA-256 09bc9ab686062a16…

MALICIOUS

PDF

98.6 KB Created: 2021-07-13 14:34:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 15aaf3fca94c91ddf87823fcfa273231 SHA-1: 3bcbdf24b68cde47b6d2c258e961648a349e8320 SHA-256: 09bc9ab686062a16577f4153ad6fa714563e13fcd3c34b00185f26127bc87547
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 embedded URLs pointing to compromised WordPress sites and other disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of external URI heuristics and the PDF_SEO_DISPOSABLE_LINK_FARM firing indicate a strong intent to distribute malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9922

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://irlanc.ru/uplcv?utm_term=real+world+bad+blood+cast PDF link annotation
    • http://matsusushionline.com/uploads/files/zazinanepejemem.pdfIn PDF document text
    • http://stauarchitetti.eu/userfiles/files/30156725582.pdfIn PDF document text
    • http://szyuangang.com/UserFiles/file///nudilajiretometiwa.pdfIn PDF document text
    • http://www.iqubz.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084b11a11763---pevekogaf.pdfIn PDF document text
    • http://clarkstownhs64.com/clients/2/25/255c49a504cbad61718694d8b78dfcdd/File/20252119293.pdfIn PDF document text
    • https://travolution.travel/wp-content/plugins/super-forms/uploads/php/files/7feaac61b8c1530364dd8c5561d55dba/29288905417.pdfIn PDF document text
    • http://trenermichal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160aa5f6b39742---73050087305.pdfIn PDF document text
    • http://modelkyujin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba7453b3b13---43246986099.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075c80b0f664.pdfIn PDF document text
    • http://toyotacri.com/userfiles/files/35403604054.pdfIn PDF document text
    • https://www.psalighting.com/wp-content/plugins/super-forms/uploads/php/files/40b0502d225bbbfced7018350ca64f22/zenomakevad.pdfIn PDF document text
    • https://staffxrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/db205517f9b33c02896b36f62788514c/40613757794.pdfIn PDF document text
    • https://kicksomeglass.com/wp-content/plugins/super-forms/uploads/php/files/202a31b1388b10054cf3bbaf36cffae2/nawepugasazutovilo.pdfIn PDF document text
    • http://abnicum.com/files/file/pitozuvajapigodurejan.pdfIn PDF document text
    • http://canvangdientu.com/images/file/vibelemoxajamitiguzow.pdfIn PDF document text
    • http://mfplus.ba/wp-content/plugins/formcraft/file-upload/server/content/files/160b7b14d0657a---zibuvagaxitowozivijutof.pdfIn PDF document text
    • https://www.davidcosz.de/wp-content/plugins/super-forms/uploads/php/files/skftv995fjrgjk4usaeij47udm/jesifobomeburigefaseni.pdfIn PDF document text
    • https://mariellatriolo.it/public/file/kuvezin.pdfIn PDF document text
    • https://tims.ro/ckfinder/userfiles/files/tidekonijak.pdfIn PDF document text
    • http://chandigarhdatarecovery.com/files/file/19023551806.pdfIn PDF document text
    • http://gayaarchi.com/userfiles/file/20210628102126.pdfIn PDF document text
    • https://levin-dent.ru/wp-content/plugins/super-forms/uploads/php/files/48834a6405286d36c71bb8475caca27e/21839793142.pdfIn PDF document text
    • https://doellefjelde-mussemarked.dk/images/newsmail/file/18824178545.pdfIn PDF document text
    • https://arrayamed.com/userfiles/file/fezekobamazuruwilufeleb.pdfIn PDF document text
    • https://realimpacto.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a7cc2f02d56---4099892521.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_off00011d3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D3B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00013552.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13552 10440 bytes
SHA-256: 776fe81b33ce53fd7eebf5acd6cbd745b752acc6b9918843f8f7ab8c8847f360
font_02_sfnt_off00014d31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14D31 18064 bytes
SHA-256: cf0912a78beae8760f407e69139720be26ca2c0e00c3568e96d9dc73aedc5e3d

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