Malicious PDF — malware analysis report

Static analysis result for SHA-256 e969f892ce621376…

MALICIOUS

PDF

78.4 KB Created: 2021-04-07 09:19:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 62c1418c5c5e297a8943241bab657281 SHA-1: 929cf2cf3c7663f150ab9b7229e8f427d8f69cc8 SHA-256: e969f892ce621376c2c5a918e648decbdedcb3b66c1dbd77542b9b4242016db1
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://jumiwimov.ru/123?utm_term=hiram+na+salita+worksheets+grade+4 PDF link annotation
    • http://findssldz.xyz/barriers_to_innovation_in_the_workplace9hqbd.pdfIn PDF document text
    • http://santand-es.com/658776385xeizs.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453115/normal_5fe814a06825f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392864/normal_5fedffb20395c.pdfIn PDF document text
    • http://itclick.info/duxiwolapenejojejuvuguxiiijpy.pdfIn PDF document text
    • http://abistrans.ru/heath_zenith_motion_sensor_light_stays_onp01hu.pdfIn PDF document text
    • http://money-team.site/bisasojigajojojogipivewy5l.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424666/normal_604605005fc48.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421637/normal_6026513c55b1e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373983/normal_6036ceb5c55ad.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470228/normal_5ff59c9e0bd46.pdfIn PDF document text
    • http://evromotors.net/washington_department_of_licensing_report_of_salefr1pp.pdfIn PDF document text
    • http://lavka-karamel.ru/92519966115ruglg.pdfIn PDF document text
    • http://24goodstore.site/toeic_reading_test_part_5j0osn.pdfIn PDF document text
    • http://brumbum6.xyz/29903479350x4dn0.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/salade/kolavusibugutujatoleso.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/400ceaee-b4b9-4519-9b1b-1b34d3870850/histria_e_geografia_do_brasil_para_concursos.pdfIn PDF document text
    • https://s3.amazonaws.com/jopomodilamego/26270760368.pdfIn PDF document text
    • https://s3.amazonaws.com/xufoxorog/how_to_write_dialectical_journals.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7db166f4-eac2-46fb-ae64-7a5e24badead/how_to_cut_a_buzz_cut_yourself.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_off0000f45d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF45D 5444 bytes
SHA-256: ac25f4018f135e07e1dd036aa89b2c801e187ee6e7c5667d5f4561e91c84e27f
font_01_sfnt_off000106c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106C5 11204 bytes
SHA-256: 2d42c8998972a6f3d120106bc95aff5a06fbffb604a1df3770f55ae5438a036c

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