Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f2a914f46b1535b…

MALICIOUS

PDF

75.1 KB Created: 2021-04-05 05:49:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: d2ae11ff57f9db2933a406304ced53a8 SHA-1: e878b609cfbef37ae40966b38f7b21ad526f3693 SHA-256: 3f2a914f46b1535b930cac2f4b0a60c54f1e852770b6c353ca4f248454d3c860
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://kuzutuzo.ru/wix?keyword=btd+5+apk+ios PDF link annotation
    • http://kimidenexikox.getenjoyment.net/joins_mac.pdfIn PDF document text
    • http://vipadobotisituz.mygamesonline.org/wenoputelepunuremugu.pdfIn PDF document text
    • https://vosewisujar.weebly.com/uploads/1/3/5/3/135398140/gudogazodemijafevi.pdfIn PDF document text
    • http://sesesuruko.mypressonline.com/tepelirijavawitu.pdfIn PDF document text
    • https://cdn.sqhk.co/xanutabe/cSgeDjd/real_time_fandub_games_tv_tropes.pdfIn PDF document text
    • http://nijewogifuzazi.mypressonline.com/11911610409.pdfIn PDF document text
    • https://cdn.sqhk.co/gitovera/ihtSngh/matlab_plot_legend_multiple_lines.pdfIn PDF document text
    • https://xijexarara.weebly.com/uploads/1/3/4/0/134017378/towaladobavivufor.pdfIn PDF document text
    • https://cdn.sqhk.co/xorudonox/aggcosE/elementos_del_texto_argumentativo.pdfIn PDF document text
    • https://cdn.sqhk.co/pimepojuti/bgONjjI/zigasovawarigusew.pdfIn PDF document text
    • https://rozomibevepozif.weebly.com/uploads/1/3/0/7/130775668/ximifawole.pdfIn PDF document text
    • https://cdn.sqhk.co/meradipuwiz/ibieBbQ/building_guide_fortnite_pc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/1667780e-57d3-4c88-9603-b549ac708874/what_element_has_two_valence_electrons.pdfIn PDF document text
    • https://1350f94c-8d6f-42b4-8351-24983ad6a49a.filesusr.com/ugd/4aae87_4dcc3d9e06ed4a34ac18f528dfe275f2.pdf?index=trueIn PDF document text
    • https://98771922-91e4-4673-aa0d-7794f4435593.filesusr.com/ugd/b6aaa0_d45195ba6b70434ea80e5bf842e68c2e.pdf?index=trueIn PDF document text
    • https://587b455d-cc79-4428-8e80-a8b75ce23bca.filesusr.com/ugd/021ec8_107c93af702e41b3b5cee15f3d71143c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gizonukorad/everglow_bon_bon_chocolat_album.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/718e4dc9-489c-4987-9a57-7eb6d7540ee0/dojidox.pdfIn PDF document text
    • https://6d4cd3b7-91e9-43ac-92b9-205473f1e50d.filesusr.com/ugd/28146e_f333e1a557ee44bcb9346072573b3f38.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd60d309-fdf3-424b-bdab-fdec6da10775/69829384037.pdfIn PDF document text
    • https://s3.amazonaws.com/dutimajizowa/minority_report_tv_show_season_2.pdfIn PDF document text
    • https://s3.amazonaws.com/neviwove/34866618691.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e969.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE969 5064 bytes
SHA-256: b9ddb6fbffc6fb7c882c08d37bfe05eaa0db40f6239affd11a781720f5ed7c6d
font_01_sfnt_off0000fabc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFABC 10744 bytes
SHA-256: b5da3180d6002ef9accfdab6f300750e2ced030bb28e2d68992b30b70e3d0481