Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c087dc1f84fcdff…

MALICIOUS

PDF

89.5 KB Created: 2021-06-26 21:45:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: fa929e822947faa8100c236a62ffcc97 SHA-1: 1f6d2568d342c2f5a9509713c42d9d16e133d25f SHA-256: 0c087dc1f84fcdffe31a64a5d048a39985b8218b39f7f39765ced81689b9f12b
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous URLs pointing to compromised or disposable hosting, suggesting an attempt to redirect users to malicious content. The presence of PDF-specific heuristics related to link farms and external URIs further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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://zhongguohuachun.com/d/files/kudoxovodugitidol.pdf In PDF document text
    • https://evenimentecastel.ro/wp-content/plugins/super-forms/uploads/php/files/0uacf7cjkjpjasodepg2u64sl7/xusezaravajug.pdfIn PDF document text
    • http://www.jindatunnel.com/up_files/file/zasubuk.pdfIn PDF document text
    • https://www.infrascale.com/wp-content/plugins/super-forms/uploads/php/files/a1b99900390796f3d9c9b419349f5b14/61936170648.pdfIn PDF document text
    • http://stroynerud-sm.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160853640e9c9d---dogolar.pdfIn PDF document text
    • http://al-bandak.com/userfiles/file/gezov.pdfIn PDF document text
    • http://kiemtoanhaiphong.vn/upload/files/26634642427.pdfIn PDF document text
    • https://shotclock.ca/wp-content/plugins/super-forms/uploads/php/files/fce88ecb64060b0874881c82b8643ded/pakimibokalironi.pdfIn PDF document text
    • https://www.18fire.com/wp-content/plugins/super-forms/uploads/php/files/b890f3fe3e668283637b1f56f114e8de/59457840398.pdfIn PDF document text
    • http://futurepoolandspa.com/ckfinder/userfiles/files/24137805286.pdfIn PDF document text
    • https://dsodrecital.com/wp-content/plugins/formcraft/file-upload/server/content/files/160759a54e1a44---88387049084.pdfIn PDF document text
    • https://www.physioaktivkramer.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ba2f2d1bc19---kozujikagage.pdfIn PDF document text
    • https://easy2ticket.com/upload/files/96736009829.pdfIn PDF document text
    • http://asfus.net/virgsurv/userfiles/file/funamipekanutaxexego.pdfIn PDF document text
    • https://kalyna.ua/sites/default/files/userfiles/file/23019192109.pdfIn PDF document text
    • https://www.andeanskyline.com/wp-content/plugins/formcraft/file-upload/server/content/files/160710eebb4657---36091466018.pdfIn PDF document text
    • http://bright-mineral.com/uploadfile/file/2021052011174050.pdfIn PDF document text
    • https://amagi.la/wp-content/plugins/formcraft/file-upload/server/content/files/160b30e473f2a8---14153958443.pdfIn PDF document text
    • https://kopari.hu/files/file/52024759466.pdfIn PDF document text
    • http://heilpraxis-pankow.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a9678f35886---52990164560.pdfIn PDF document text
    • https://apexforestservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607425df39047---73812365961.pdfIn PDF document text
    • https://askopenko.com/wp-content/plugins/super-forms/uploads/php/files/e1f0d1923a8905711a5c3c8195f08e81/rijemavatiwatofepusogon.pdfIn PDF document text
    • https://jdrum-music.com/uploads/ckfiles/files/tededijemoxamoranomarij.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=hoare+laval+pactPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fa22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA22 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011239.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11239 10060 bytes
SHA-256: 7414a64987080581cd75264dc3b8c8fc254947f7413c5aee6d186a6e3d3fd31c
font_02_sfnt_off000128b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128B8 18404 bytes
SHA-256: 5f470aad7244db1ad44bbdf55b8b1cecf72b0d99dc78f70af121ce6a5bb05d43

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