Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b601b29e756be37…

MALICIOUS

PDF

83.7 KB Created: 2021-05-18 05:04:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 0837a52288ae1dd93acb60a58299582f SHA-1: 8bb9b5d96aa0f7eb7805166ec158314de2115466 SHA-256: 8b601b29e756be375b6a5a7c3de162c5db8117ba7e123c93090b47c90be6ff2f
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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://crophysi.ru/strik?utm_term=top+10+town+hall+11+base PDF link annotation
    • http://gisejol.iblogger.org/mitubedugoverogiwa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459774/normal_5fd264dd0fc76.pdfIn PDF document text
    • http://gigazukiwizave.22web.org/11628336639.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427274/normal_5fdf5f8804282.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453907/normal_6038b532146cb.pdfIn PDF document text
    • http://lavorunolutoga.22web.org/twilight_breaking_dawn_part_1_full_movie_in_hindi_dubbed_480p.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/f1936fad-238a-4ed0-afcc-8dde95c0bd8b/dantes_paradiso.pdfIn PDF document text
    • http://soxomidil.epizy.com/29512224001.pdfIn PDF document text
    • https://s3.amazonaws.com/loneminovu/vivaldi_summer_sheet_music.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b86e64ec-1d01-46cc-9a6b-a268cc3488f0/mordheim_pit_fighter_warband_rules.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8da10542-25db-4585-8282-56ea9d171b21/g_shock_mudman_strap.pdfIn PDF document text
    • https://s3.amazonaws.com/xoguwavosuje/safuna.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a716ea14-7047-40e6-9eeb-9a7afe58ec68/xirisokawuvifigivuti.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6557ea3f-1c20-4d56-894c-e49f62c58111/50663792721.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d562658d-ed9a-40ee-b8e5-89555d2920ed/what_is_the_average_salary_of_an_aeronautical_engineer_in_india.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/160f44c4-edd9-4337-8ea8-3a40978cd665/cloze_reading_worksheets_for_high_school.pdfIn PDF document text
    • http://ximolamerojizud.epizy.com/manchester_united_leicester_match_report.pdfIn PDF document text
    • http://sivutesafukim.rf.gd/89651134963.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6eff62cb-718e-437b-ad66-1fb4d868b665/rash_on_my_daughters_cheeks.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f3b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3B0 5184 bytes
SHA-256: 16924ffa2a33de53c48b0c1146897b1c1960bd4f0ca86ccb6068361937578fac
font_01_sfnt_off00010565.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10565 11424 bytes
SHA-256: 66cadce3af040187e7193077fb65922212c6b9bdaa6a0c75f7f39c7cc9c21435
font_02_sfnt_off00012c71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C71 16204 bytes
SHA-256: c988415812f594187b0a0ed75dc52802e798e1695b49bd300f8412a65040a449

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