Malicious PDF — malware analysis report

Static analysis result for SHA-256 f65f2dbb383d0bb6…

MALICIOUS

PDF

85.6 KB Created: 2021-05-09 02:51:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: eb8223c8dec393cc256043f6e0c7de50 SHA-1: e11ee8d5b359410087e5b99b9ae405b255ef11ba SHA-256: f65f2dbb383d0bb682ecdef673c18af09c0e1b757b54238375993ad17dd60cc2
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 0.9995

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://vilenefex.ru/strik?utm_term=cost+of+living+index+ranking PDF link annotation
    • http://xivazokib.medianewsonline.com/advanced_mathematics_statistics.pdfIn PDF document text
    • http://teaitalis.space/bcbs_blue_medicare_prior_authorization_forms6pjzy.pdfIn PDF document text
    • http://consumer-data-protection-bureau.com/kimorij9gun.pdfIn PDF document text
    • https://cdn.sqhk.co/ruzemesafe/tN97Ggf/b_r_i_d_e_4_letter_words.pdfIn PDF document text
    • https://cdn.sqhk.co/fuzokikili/ajhWk5E/65627527799.pdfIn PDF document text
    • http://warixedivukinat.mygamesonline.org/33577064076.pdfIn PDF document text
    • http://xafesuvorolivig.scienceontheweb.net/92803237552.pdfIn PDF document text
    • https://cdn.sqhk.co/zorimedi/hjapxOS/mas_outsourcing_guidelines_july_2016.pdfIn PDF document text
    • https://cdn.sqhk.co/pigexebobe/Vihl3Bn/hobby_lobby_in_hartford_ct.pdfIn PDF document text
    • http://luxibenuguk.getenjoyment.net/biology_books_download.pdfIn PDF document text
    • http://ru-payment.casa/godwin_nfl_injury_reporteucyw.pdfIn PDF document text
    • http://cabinetsop.xyz/28571227640moqfs.pdfIn PDF document text
    • http://sepozimog.scienceontheweb.net/shell_script_tutorial.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://s3.amazonaws.com/remavuj/perfect_subjunctive_spanish_worksheet.pdfIn PDF document text
    • http://kuzemepusiloj.onlinewebshop.net/what_is_another_word_for_a_few.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/89b10908-b32c-44c7-b40d-90406038866b/66851071616.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a32b2709-7417-4958-88c3-1f314996806c/tepisavopogefomag.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/87ecf134-555d-4345-b9fc-be4bc038e1c3/are_baby_bullet_parts_dishwasher_safe.pdfIn PDF document text
    • https://s3.amazonaws.com/libowebujakux/96736191079.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/343b5adf-1840-4f12-a7b2-8e3a57c67f4a/caron_one_pound_yarn_colors.pdfIn PDF document text
    • https://s3.amazonaws.com/wunojipu/black_and_decker_cordless_drill_charger_12v.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6fe333d4-5d57-4c8d-80e6-f15c2ceedc16/new_call_of_duty_ps4_cold_war.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_off00010242.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10242 5080 bytes
SHA-256: c88e6ada0977d86788e471654667aed057022f93426fba158a74785cf6051411
font_01_sfnt_off000113a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113A5 11536 bytes
SHA-256: 4ea058c6d2048aa9155cfcc133248798943963c9f97665ec2df28d0731f4e20b
font_02_sfnt_off00013abd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13ABD 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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