Malicious PDF — malware analysis report

Static analysis result for SHA-256 884b238901b53009…

MALICIOUS

PDF

120.4 KB Created: 2021-06-08 00:33:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 0e52e9c65aacea3bf6d8a7ab6d6d710a SHA-1: 11047ef30348184773e8e6ecbe127adc83a3bd79 SHA-256: 884b238901b53009b6ae4e4d7a2ec803a7552b756a91fe85fb6e63ca930f390c
156 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9998

Heuristics 5

  • 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.
  • 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://crewmak.ru/pbw?utm_term=oscar+et+la+dame+rose+zusammenfassung PDF link annotation
    • https://dawofatodir.weebly.com/uploads/1/3/4/7/134756430/a2e9876.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446034/normal_5ffbdd8e76009.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4529281/normal_5ff1ba5218bd4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459629/normal_5fd1d2de62017.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427300/normal_5fdf473a6d977.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366382/normal_604f89d164b0b.pdfIn PDF document text
    • https://towizitubozabo.weebly.com/uploads/1/3/5/4/135400713/1c9d4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451205/normal_5fd1b51b142c6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391008/normal_60662dbcb36d0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489976/normal_6020773c9d10d.pdfIn PDF document text
    • https://sapemeke.weebly.com/uploads/1/3/2/8/132814969/zajijusitijomiv-kobofa-wufijuduvobijof-lubixu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/92f0ca5e-acb0-4e33-8571-ed03b320854d/how_to_clean_the_filter_of_a_beko_washing_machine.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e15be4ae-e911-45d6-b487-13f81ffb6022/90157246049.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/67b883fe-3298-4eea-8d76-dbbe7b21d548/how_to_pair_jam_hang_speaker.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a46d3eea-58e0-4801-b8cb-c21ad369eaa5/american_red_cross_cpr_instructors_corner.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5fb5279b-4069-42d8-9e94-9020bb59bb25/mary_poppins_chimney_sweep_dance.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5fe276e0-0f7b-4f56-91de-53031e2f4890/aircraft_maintenance_engineer_employment_rate_canada.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/383a85f4-d855-47c2-8034-e842b0e057c9/derimukumoz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db44ed1b-f818-4cfd-84ed-7a58015afcaf/how_to_obtain_a_driver_license_in_massachusetts.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000187e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x187E0 5252 bytes
SHA-256: 5404fb0abb3278db21bba307bf54e8380e92413958c57732658c8f72c1aebd2e
font_01_sfnt_off000199af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x199AF 13812 bytes
SHA-256: ca89527e03da2ba555c929ec1541cfc11bf8a074ca3ec03181ade8b71ff370da
font_02_sfnt_off0001c3a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C3A8 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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