Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e7e8e6110e889ef…

MALICIOUS

PDF

118.6 KB Created: 2021-03-11 10:55:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 41009053c909e260063bb37360b92734 SHA-1: 9861ffe0fb4e2f90ae847ce2df864b71ae9918ab SHA-256: 9e7e8e6110e889effe186e844a4aa70ab1c215a967f2d439db7a008de9d1687d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

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 0.9988

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://seumenha.ru/123?utm_term=irony+in+the+crucible+answers PDF link annotation
    • https://cdn.sqhk.co/wamiratena/ghCCigY/showed_you_my_answer_me_meme.pdfIn PDF document text
    • http://vobefoli.iblogger.org/zolomabebogazepamof.pdfIn PDF document text
    • https://cdn.sqhk.co/vetelojid/ojfjgdT/pepper_s_italian_restaurant.pdfIn PDF document text
    • https://piwetidij.weebly.com/uploads/1/3/2/3/132303123/729420.pdfIn PDF document text
    • https://lewagezu.weebly.com/uploads/1/3/4/3/134369469/6099838.pdfIn PDF document text
    • https://ramakizuwag.weebly.com/uploads/1/3/4/3/134321509/tazedoxud.pdfIn PDF document text
    • https://cdn.sqhk.co/birenejar/1hijeNV/brain_games_3d_find_the_remote.pdfIn PDF document text
    • https://falojabuvo.weebly.com/uploads/1/3/4/7/134774067/7846371.pdfIn PDF document text
    • https://cdn.sqhk.co/vamosopon/iihzRhb/pusuredog.pdfIn PDF document text
    • https://putusura.weebly.com/uploads/1/3/1/6/131606782/pomulebup.pdfIn PDF document text
    • https://cdn.sqhk.co/gewewoturila/ijFnhsZ/21157056226.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/lejivugeleguwod/adjective_worksheets_for_grade_10.pdfIn PDF document text
    • https://s3.amazonaws.com/pulujolatepuv/62076696246.pdfIn PDF document text
    • https://s3.amazonaws.com/fokapikow/terms_of_reference_template_australia.pdfIn PDF document text
    • http://pudusibojekajip.rf.gd/laterite_soil_formation.pdfIn PDF document text
    • https://a84030a7-2e48-4039-807a-383e2b7216cc.filesusr.com/ugd/c5d40f_87120f583ae74a63b76f6802b49b40c9.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xamapebonijos/75234642558.pdfIn PDF document text
    • https://s3.amazonaws.com/radubozufiwo/audacity_windows_32_bit.pdfIn PDF document text
    • https://s3.amazonaws.com/wujafivabipo/boss_2_bangla_movie_hd.pdfIn PDF document text
    • http://jonogib.epizy.com/que_hace_una_mecanica_dental.pdfIn PDF document text
    • https://s3.amazonaws.com/memobofilenabon/30767017990.pdfIn PDF document text
    • http://nibatozov.epizy.com/pakutasel.pdfIn PDF document text
    • https://s3.amazonaws.com/tiduro/67811780125.pdfIn PDF document text
    • https://ac65beef-1c88-4b01-a948-251493ed82f2.filesusr.com/ugd/09857b_5ac59d89acfb4e73b88c833a68ab381a.pdf?index=trueIn 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_off000197a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x197A2 5156 bytes
SHA-256: 5a49d4589537342e7231d6e739e4d757888687ee95b92cae594374ed5cf8aa61
font_01_sfnt_off0001a93c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A93C 10432 bytes
SHA-256: 7328a509f69dd3e1d5c3021e0d64dded2f352fae4fb3b6b6ee359ec65ac8d53b

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