Malicious PDF — malware analysis report

Static analysis result for SHA-256 67b15e0f784f222b…

MALICIOUS

PDF

76.8 KB Created: 2021-03-11 13:52:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 8ef66eee9d962f9367d4adda9c50b3a6 SHA-1: 72e24738a8b87033c96df5c826259a6a6e484d18 SHA-256: 67b15e0f784f222bf103ecb00a23867bc24839b70fcc321b3c1aeb6d1f662c05
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://seumenha.ru/aws?utm_term=how+to+troubleshoot+a+heat+pump PDF link annotation
    • https://cdn.sqhk.co/seponidozit/dLgdjd1/59766604201.pdfIn PDF document text
    • https://mirinojasuri.weebly.com/uploads/1/3/4/5/134588432/3635934.pdfIn PDF document text
    • http://mozobadijoba.medianewsonline.com/76738692557.pdfIn PDF document text
    • https://cdn.sqhk.co/vefusujix/jcnibja/radar_mobile_speed_gun_with_camera.pdfIn PDF document text
    • https://fekifefexil.weebly.com/uploads/1/3/0/8/130815726/dc62931b42921.pdfIn PDF document text
    • https://juzowugaf.weebly.com/uploads/1/3/4/7/134773334/b76463d.pdfIn PDF document text
    • https://kedumapeba.weebly.com/uploads/1/3/4/5/134593926/00872.pdfIn PDF document text
    • http://tosasex.22web.org/occupational_burnout_journal.pdfIn PDF document text
    • https://cdn.sqhk.co/lebogomatoze/ig3kLgh/vedevevixatif.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wukevivetarapu.myartsonline.com/the_fault_in_our_stars_book_quotes_with_page_numbers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b80f72f5-c3b1-48dd-8b84-ce386bc46037/bifanerujogupowifojedul.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/173f9c26-58f0-420a-b6d3-5d976986eb73/hp_officejet_pro_8600_plus_printing_black_lines.pdfIn PDF document text
    • http://denotepisijolib.rf.gd/eia_oil_report_fxstreet.pdfIn PDF document text
    • http://bovesaligete.rf.gd/adobe_premiere_pro_free_download_full_version_for_pc_2020_crack_32_bit.pdfIn PDF document text
    • https://ca30e0e0-ecf2-44ab-b6a2-fe26291458be.filesusr.com/ugd/34e21e_c0d5c4675e5549cd810235aedc032270.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/02ccaef8-8304-4d03-b1fe-b3321ceb79c4/smart_board_online_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/47635d34-4f95-4492-88d7-2a10cfdc3d33/80818084622.pdfIn PDF document text
    • https://4ec63ec4-77bf-4499-900e-7c522af20654.filesusr.com/ugd/35bdb9_f53b9bcd1a1047e8a57d24ba5cc81209.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/da445bcb-d382-425a-a0af-4659686ea60d/zipijatebifuxow.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_off0000efa9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFA9 5252 bytes
SHA-256: 10c9a76efd80fa0b68ddb967b415833f37e15a77d4b6be9c4bd5524762aed128
font_01_sfnt_off00010161.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10161 10732 bytes
SHA-256: fe90a4faa0ac4be3fd64b8cadbcb38c299d9314223041d4e73809513a1ba2ef1

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