Malicious PDF — malware analysis report

Static analysis result for SHA-256 78e6edcfcf885c8a…

MALICIOUS

PDF

72.1 KB Created: 2021-03-24 15:21:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 3c24081de55b02c6cbbd4a90daf47638 SHA-1: 5c7defe36dc1ef80ff01eef0f9a1255b3a5243ce SHA-256: 78e6edcfcf885c8a92d03e800175639272f1feb3e6d50cb5f515ffc8a7e330db
134 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically identified as a phishing trojan. It contains an external URI pointing to a suspicious domain, mezovuduw.ru, which is also part of a link farm on disposable hosting. The presence of a download button lure further suggests a phishing or social engineering attempt to trick the user into downloading a payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://mezovuduw.ru/award?keyword=punjab+benevolent+fund+form+2020+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4463306/normal_60369148b3234.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469349/normal_5fe0ae7d46297.pdfIn PDF document text
    • https://vanuvinuvur.weebly.com/uploads/1/3/0/9/130969573/9696251.pdfIn PDF document text
    • https://kenemujawov.weebly.com/uploads/1/3/4/6/134645985/3840103.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418180/normal_5fd242d49788d.pdfIn PDF document text
    • http://zokugorevat.mywebcommunity.org/savage_320_field_grade_shotgun_reviews.pdfIn PDF document text
    • http://tesekal.mygamesonline.org/how_much_is_big_tom_worth.pdfIn PDF document text
    • http://geesecam.com/senebapefi16m53.pdfIn PDF document text
    • http://pifedalune.medianewsonline.com/15155871940.pdfIn PDF document text
    • http://predouche.xyz/blank_face_sheets_for_makeupzd34a.pdfIn PDF document text
    • https://zexivavu.weebly.com/uploads/1/3/4/8/134872555/4149448.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457298/normal_60594864705c5.pdfIn PDF document text
    • http://xbet1.fun/how_to_start_a_marine_diesel_engineqcn62.pdfIn PDF document text
    • https://jokuvaput.weebly.com/uploads/1/3/4/5/134589987/4774900.pdfIn PDF document text
    • https://liwavijej.weebly.com/uploads/1/3/4/3/134379327/paranajike_nosesuwisuped_kowavebono.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426572/normal_604d15e98ce0e.pdfIn PDF document text
    • http://yourdesk.website/zejinitajotke3yp.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4502175/normal_602d825273af5.pdfIn PDF document text
    • http://circus.market/el_dia_que_la_tierra_se_detuvo_pelica0s0d.pdfIn PDF document text
    • http://vofufime.mypressonline.com/gawelusup.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4406820/normal_5fcd8f3074d44.pdfIn PDF document text
    • http://vizemezezu.sportsontheweb.net/arduino_simulation_with_proteus.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/fe19afa5-5f01-4c0e-a7af-e1ecf0255b10/63900803577.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/927ea67e-e20d-4d1d-b0e3-040b7d2286f5/jodozubaxodosoxexo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e072dc4-78d5-443a-91ae-092193c69e02/casio_protrek_prg_270_specs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/65ab4fe3-1f53-4cfc-ab58-d24a67dd7ca6/jam_bluetooth_speaker_not_connecting_to_iphone.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/753a6caa-8a2d-43ed-b34d-50f6b7ab2135/which_indian_vegetables_are_good_for_weight_loss.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_off0000dbbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBBD 5560 bytes
SHA-256: 797ac7c58b273ef5a6d1bb1e80f125babf6e476550831af5e57e0e5d2c9abfad
font_01_sfnt_off0000ee9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE9B 10540 bytes
SHA-256: 7aae3dae2fb5a91b117fac344368749acc4784009a2d5eba68e21e001dcf71f7

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