Malicious PDF — malware analysis report

Static analysis result for SHA-256 e82f9c2f0372bb2e…

MALICIOUS

PDF

75.2 KB Created: 2021-02-26 09:01:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 9c3dd26f5d92bdc2d630596e746b92f9 SHA-1: e939a5899669589af0b1464aea08cb7c7f720499 SHA-256: e82f9c2f0372bb2ed80d035853058c77140656bda42ff6246641b4e6bdade2aa
96 Risk Score

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 as a phishing trojan. It contains an embedded URI pointing to a URL that appears to be a lure for 'Tws k2 earbuds pairing'. While no scripts were explicitly extracted, the presence of embedded URIs and the nature of the detection suggest it is designed to redirect users to a malicious site, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://jottigo.ru/strik?utm_term=tws+k2+earbuds+pairing PDF link annotation
    • http://ryukzak.digital/que_son_los_signos_de_entonaciond5r2p.pdfIn PDF document text
    • https://cdn.sqhk.co/movozuba/6bhi5ja/lijadabip.pdfIn PDF document text
    • http://drenajkrasnodar.ru/lunododidujuhgsms.pdfIn PDF document text
    • https://cdn.sqhk.co/nalujujoso/ljhifhi/ducks_unlimited_jobs.pdfIn PDF document text
    • https://cdn.sqhk.co/rubogomuweme/gdE9TFH/rumble_in_the_jungle_setting_nyt_crossword.pdfIn PDF document text
    • http://natur-green.fun/midirufarujagigi70l.pdfIn PDF document text
    • http://teleporttur.ru/954053228143sdti.pdfIn PDF document text
    • https://cdn.sqhk.co/xovatagemi/ggjbhg2/nolizexupefesiz.pdfIn PDF document text
    • http://boost-shop.xyz/kenmore_stand_mixer_partsllvr6.pdfIn PDF document text
    • http://getsalle.xyz/75131334534ko4nb.pdfIn PDF document text
    • https://cdn.sqhk.co/fasotaluvose/0hcQ7jb/jijuxeninifomidelekukin.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/muvojugejoxip/parts_of_speech_chart_elementary.pdfIn PDF document text
    • https://s3.amazonaws.com/tisegovofu/13500819079.pdfIn PDF document text
    • https://s3.amazonaws.com/wiwamoxamo/addictive_games_offline_android.pdfIn PDF document text
    • https://s3.amazonaws.com/muxegeza/illinois_driving_permit_test_questions_and_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/veledabejufi/service_blueprint_template_powerpoint_free.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_off0000e4aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4AA 5472 bytes
SHA-256: 33934ab45b7e744fee4c744cfb32122fd4c2608a0eff0f4462d076f983dcce43
font_01_sfnt_off0000f769.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF769 11976 bytes
SHA-256: 8ab614de61206df6deb6d268504b5f3008bc12f67404defa43a1a9365ee19afe

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