Malicious PDF — malware analysis report

Static analysis result for SHA-256 723611eb7629ebbf…

MALICIOUS

PDF

76.4 KB Created: 2021-04-08 02:14:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: f6be158a77cfba424d85342b0e1edfb9 SHA-1: 5545cbef53c67adae40f53139db606c1be8f7c77 SHA-256: 723611eb7629ebbfe930eb0fe52f8870d8f1f2e674ac7c5d8e6e7b108313f68b
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 0.9997

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://ponafet.ru/wix?keyword=bible+family+tree+abraham+to+jesus PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4375696/normal_5fd729d128413.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382413/normal_601d548ecf699.pdfIn PDF document text
    • http://lepawarowupi.iblogger.org/75459326845.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490528/normal_6047c2599be61.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369487/normal_6009e92bd5acc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477921/normal_5fd9bbca30b7b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393635/normal_601dc7a1ec7c3.pdfIn PDF document text
    • http://idealsit.space/spindrift_inn_652_cannery_row_monterey_ca_93940zljso.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447464/normal_60624b41b5c58.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419003/normal_5ff4630e43062.pdfIn PDF document text
    • http://xejomukeg.22web.org/2000_yamaha_v_star_1100_classic_service_manual.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365583/normal_601610020f9af.pdfIn PDF document text
    • http://money-team.site/nezaxolipanc0z5e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/sazomo/canada_machine_learning_salary.pdfIn PDF document text
    • https://s3.amazonaws.com/wufujudisu/how_to_calculate_exponents_on_casio_fx_260_solar.pdfIn PDF document text
    • https://s3.amazonaws.com/dudigonifu/color_by_number_math_worksheets_for_middle_school.pdfIn PDF document text
    • http://povapetaranawo.rf.gd/patapukoxizijujuwunu.pdfIn PDF document text
    • https://s3.amazonaws.com/jofunozuzof/7158665702.pdfIn PDF document text
    • https://s3.amazonaws.com/lurutopobi/what_is_neil_degrasse_tyson_most_famous_for.pdfIn PDF document text
    • https://s3.amazonaws.com/nagudo/rafijudoro.pdfIn PDF document text
    • https://s3.amazonaws.com/sikuva/malolir.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_off0000eb49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB49 5376 bytes
SHA-256: cf6fe64565d0f43f02c97985dbe00c753399e1943e2c4d88d39f61ec23570bea
font_01_sfnt_off0000fd75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD75 10888 bytes
SHA-256: efad662e37678d6fc8ff721bba689b94483e0c4057522f8f0a99c1f599cc664b

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