Malicious PDF — malware analysis report

Static analysis result for SHA-256 dcbddbe77de04564…

MALICIOUS

PDF

71.5 KB Created: 2021-03-07 21:41:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: da08784ba9bdee8618dd97f968f5639e SHA-1: d210931bbb8670cf97b3f39877039e7b47d1edf5 SHA-256: dcbddbe77de04564b844a0b9f9900cb59d14ef6726650b1b45c733b9a96051f6
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with several pointing to disposable hosting and one specifically flagged as a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were extracted, the heuristic firings and URL analysis suggest the document's primary purpose is to redirect users to potentially harmful external sites.

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 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://baarspo.ru/wb?keyword=bright%20eyes%20simon%20and%20garfunkel%20ukulele%20chords PDF link annotation
    • http://bobixuposu.22web.org/43678233999.pdfIn PDF document text
    • http://sewatumafuta.medianewsonline.com/technical_drawing_applications_icse_board_paper_2017.pdfIn PDF document text
    • http://jukojadijomefar.medianewsonline.com/kejatomenupoxitefaridewi.pdfIn PDF document text
    • http://dodemul.mygamesonline.org/rode_videomic_pro_or_pro_plus.pdfIn PDF document text
    • http://duwinijuj.mypressonline.com/what_are_the_only_two_rivers_that_flow_north.pdfIn PDF document text
    • http://thepropheticapp.com/nebukudutadepebejdda8.pdfIn PDF document text
    • http://reduslim-eu.site/485782514049r74m.pdfIn PDF document text
    • https://zopizegojuv.weebly.com/uploads/1/3/1/3/131380511/kizipasesijupof-nomawedegomib.pdfIn PDF document text
    • https://mudituzeko.weebly.com/uploads/1/3/0/9/130969310/2780263.pdfIn PDF document text
    • http://meetsalle.xyz/call_recording_videoxz70t.pdfIn PDF document text
    • http://pimamuxup.22web.org/99251784109.pdfIn PDF document text
    • http://womizepivilora.sportsontheweb.net/why_does_my_printer_keep_saying_no_paper.pdfIn PDF document text
    • https://sagerogokijisoj.weebly.com/uploads/1/3/4/6/134601402/5379ecb18694f0.pdfIn PDF document text
    • http://remont-kvartir-otzyvy.moscow/5285724426343uwg.pdfIn PDF document text
    • http://xubaseki.iblogger.org/baofeng_uv-5r_range_miles.pdfIn PDF document text
    • https://tiwedipetubed.weebly.com/uploads/1/3/2/8/132816066/8038492.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://ketawod.epizy.com/best_bow_tie_alfredo_pasta.pdfIn PDF document text
    • http://wonanikapudidak.atwebpages.com/diablosport_intune_i1000_vehicle_list.pdfIn PDF document text
    • http://pujusojup.epizy.com/securing_draenor_achievement_guide.pdfIn PDF document text
    • http://disemetizoxexo.rf.gd/el_alquimista_libro.pdfIn PDF document text
    • http://zakizil.rf.gd/81427428566.pdfIn PDF document text
    • http://tuxabatadifu.onlinewebshop.net/visual_basic.net_download_for_mac.pdfIn PDF document text
    • http://nodikisiti.rf.gd/4627905343.pdfIn PDF document text
    • http://besuwodusibix.rf.gd/gerabidonelani.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d0de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0DE 1596 bytes
SHA-256: ca0a280421723b206518063d4fdf2e3afc24c126416f3acfdb523774357dcdd5
font_01_sfnt_off0000d8d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8D9 5652 bytes
SHA-256: 32c0c219387401b7c2c5d4f1ff02aa3525f78fc95882223cc365a67042204553
font_02_sfnt_off0000ebfc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBFC 10432 bytes
SHA-256: fe2a018ad0f8f5d11b79339b277915295d8184bb066435fbca0bbcf027a0af05

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