Malicious PDF — malware analysis report

Static analysis result for SHA-256 6bc5d8bc48f977fa…

MALICIOUS

PDF

88.9 KB Created: 2021-02-28 04:47:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 49d84fe899894c28a58de59f7714f8f3 SHA-1: ba90a240de5157f569ba99989bb3c6f2e8caf862 SHA-256: 6bc5d8bc48f977fa186ba666ee9b6660c2e84353d6eedf40bc9949a9accc980e
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. The presence of numerous external URIs, many hosted on disposable domains and employing UTM parameters, suggests a link farm designed to obscure the ultimate malicious destination. The file's structure and embedded content point towards an attempt to trick users into downloading further malicious content, likely disguised as a document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://vilenefex.ru/strik?utm_term=1001+arabian+nights+malayalam+pdf+free+download PDF link annotation
    • https://todijaxazifaro.weebly.com/uploads/1/3/4/3/134342800/3157077.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391317/normal_6008ea2fb45a1.pdfIn PDF document text
    • http://saxobupazes.sportsontheweb.net/historia_natural_dela_enfermedad_diabetes_mellitus_tipo_1.pdfIn PDF document text
    • https://voxonevixes.weebly.com/uploads/1/3/4/3/134383310/duzixabonanor.pdfIn PDF document text
    • https://karopokonu.weebly.com/uploads/1/3/4/5/134519394/latusowifesekixanegu.pdfIn PDF document text
    • https://jafoxoxuxovawe.weebly.com/uploads/1/3/0/8/130813536/mopoz.pdfIn PDF document text
    • http://mabojexovepa.22web.org/naludorogu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379363/normal_5fd16183554a2.pdfIn PDF document text
    • http://runaxok.iblogger.org/32188857409.pdfIn PDF document text
    • http://tufuwavaziga.mygamesonline.org/joy_luck_club_book_club_discussion_questions.pdfIn PDF document text
    • http://lusaxesa.iblogger.org/much_ado_about_nothing_analysis_act_2_scene_3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409609/normal_6028e49da95fc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://smc.org.in)MeeraRegularMeera2016SMC7.0.0+20171102HussainIn PDF document text
    • http://smc.org.inhttp://smc.org.inIn PDF document text
    • http://ruvowepager.epizy.com/68805816353.pdfIn PDF document text
    • http://nejimafalun.onlinewebshop.net/how_to_fix_a_gamecube_disc_read_error_on_the_wii.pdfIn PDF document text
    • https://s3.amazonaws.com/zepifudoxapo/ganesha_atharvashirsha_in_english.pdfIn PDF document text
    • https://s3.amazonaws.com/memexelu/priority_matrix_template_free.pdfIn PDF document text
    • http://zudupaxub.myartsonline.com/physics_principles_and_problems_study_guide_answers_chapter_4.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
    • https://gitlab.com/smc/meera/blob/master/COPYINGIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e713.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE713 5888 bytes
SHA-256: ba8f487a8817aab02df490913092276986ae8e689de824b7c3e6d36f53a2ff87
font_01_sfnt_off0000fafd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAFD 9152 bytes
SHA-256: be7fdba5e46aed04bf497e4c963c122fb492c97c893987bcf41309aba801986d
font_02_sfnt_off00011ac2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AC2 10716 bytes
SHA-256: fc58a245efd1858471a3e8243f2c2036f77f88737f00f337c8863236a18f466f
font_03_sfnt_off00013fd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13FD8 16164 bytes
SHA-256: 6e3fbd491d8b71441998836ddca0d0c102716a221ea14f8143929167ad9a79b3

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