Malicious PDF — malware analysis report

Static analysis result for SHA-256 dce278e87a26bf24…

MALICIOUS

PDF

73.9 KB Created: 2021-04-05 07:32:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: fb6aec68b903a2a3f82222819d689886 SHA-1: 57ac624750e71102b223cd44b63a508011141e79 SHA-256: dce278e87a26bf24d2d6ce092e0fbfa818f2bc4522edc048fcb61554e84346dd
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 0.9991

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://ponafet.ru/wix?keyword=yummy+ile+cumle PDF link annotation
    • http://santecmb-sarl.com/brain_teasers_for_middle_school_with_answersfi1h4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378853/normal_60644e4beaa9a.pdfIn PDF document text
    • http://zoosalon.org/george_foreman_indoor_outdoor_grill_user_manual7ppy1.pdfIn PDF document text
    • http://topuniversityru.fun/what_is_archived_unearthed_arcanaur9v8.pdfIn PDF document text
    • https://cdn.sqhk.co/temegolu/bgjgPRm/wowebabojufulu.pdfIn PDF document text
    • http://bestrongbyg.com/orion_cooker_cover_home_depotdv5r9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445119/normal_6000e4a9a5a07.pdfIn PDF document text
    • http://mon-cmbretagne.com/44381948670wnvv1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416787/normal_60298abf7933a.pdfIn PDF document text
    • http://buytoday.cc/biology_corner_worksheets_sponge_colorus5ii.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407818/normal_5ffa1d76003df.pdfIn PDF document text
    • http://xadakid.22web.org/how_to_play_guitar_for_beginners_step_by_step.pdfIn PDF document text
    • http://lg-copyrightforms.com/world_camera_live_apkwhtck.pdfIn PDF document text
    • https://cdn.sqhk.co/pofadugilip/AihaidF/service_properties_trust_ex_dividend.pdfIn PDF document text
    • https://cdn.sqhk.co/fifenije/cDYcOgi/5564455879.pdfIn PDF document text
    • http://mail-autoscout24.net/counting_binary_trees_in_data_structurej246i.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/dazovosugev/utorrent_free_for_windows_7.pdfIn PDF document text
    • https://s3.amazonaws.com/vufupu/vexiliniludafo.pdfIn PDF document text
    • https://s3.amazonaws.com/piwanisaj/how_to_charge_subaru_power_washer.pdfIn PDF document text
    • https://s3.amazonaws.com/zunaduxa/71920166513.pdfIn PDF document text
    • http://pidejekakej.epizy.com/knock_out_drum_sizing_spreadsheet.pdfIn PDF document text
    • https://s3.amazonaws.com/pewebopufupe/synonym_antonym_homonym_worksheet_grade_4.pdfIn PDF document text
    • http://kabewusibun.epizy.com/58227033942.pdfIn PDF document text
    • http://votepawawirinu.rf.gd/wokipenidigufixasivi.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_off0000e5d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5D6 4524 bytes
SHA-256: fa5536fdefb90631d3cdf6aa1470957f03c0c6c2ad6f53296e0c6c44b16b86b2
font_01_sfnt_off0000f53e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF53E 12280 bytes
SHA-256: 7e1f4370ff45c3a8ee6177be9cd0268ae806e36b54281f26e044567f575c8042

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