Malicious PDF — malware analysis report

Static analysis result for SHA-256 32d33e3769ba8935…

MALICIOUS

PDF

80.8 KB Created: 2021-02-19 08:37:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: e5f168cc21ef7d233e8de9e449221802 SHA-1: 2f15d32b59cd467003110970c862bb76e1865192 SHA-256: 32d33e3769ba8935d64c1352aea68675f799f3382abfc2e8d2ea9ac6d112bf7e
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.007 JavaScript

The PDF contains numerous embedded URLs, many pointing to disposable domains, and a heuristic firing for a 'link farm' attack. The document body, though obfuscated, appears to contain search-like queries, suggesting a lure to trick users into clicking these links. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • 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://maypoin.ru/aws?utm_term=will+tv+ears+work+with+netflix PDF link annotation
    • http://lifeit.pro/focusrite_scarlett_18i8_headphone_output_not_workingwvru6.pdfIn PDF document text
    • http://setlyb.online/bluedriver_bluetooth_obd2_scan_tooldcvpj.pdfIn PDF document text
    • http://buyfastedcircle.xyz/moduxigadinuguribapifusfkh8y.pdfIn PDF document text
    • http://myfoxing.online/41233856500bn2ox.pdfIn PDF document text
    • http://help-feedback-amzn6.xyz/pmdg_777_crack_working_displaysj7z0a.pdfIn PDF document text
    • http://top-salez.site/jalibz9qj4.pdfIn PDF document text
    • https://cdn.sqhk.co/vedafigula/irFhggc/zevujejog.pdfIn PDF document text
    • http://com-copyrighit.com/bass_booster_music_equalizer_pro_apksozsa.pdfIn PDF document text
    • https://cdn.sqhk.co/seseniluvus/hc6jgjg/61946967628.pdfIn PDF document text
    • http://fbcopyright-center.com/legend_of_suheldev_downloadilacw.pdfIn PDF document text
    • https://cdn.sqhk.co/repejuvovod/8kjecst/kusibaroxamupewutigubob.pdfIn PDF document text
    • http://remontvorot24.com/malayala_manorama_year_book_2019lpnm5.pdfIn PDF document text
    • http://leaninrzpd.site/incident_report_sample_for_nursestw9eu.pdfIn PDF document text
    • https://cdn.sqhk.co/musezikuzapi/ebCjh9X/runazawusabavemugekubor.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/vavebufevodutob/colt_m4a1_carbine_airsoft_manual.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_off00010067.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10067 5152 bytes
SHA-256: 4a2537168b80e2e6f7769f1dad28c05179de720bde7c545fc8a4b1bf3cd8321b
font_01_sfnt_off00011208.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11208 10552 bytes
SHA-256: 3db6467c3a7664acd62f467b59007bc04a1c1509d8c180ef4d91f03456238ede

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