Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a55da30c73feebb…

MALICIOUS

PDF

84.0 KB Created: 2021-06-05 14:04:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9ea46799a821321d70b9fafce51ccb01 SHA-1: c3f6c63c4bce2552c12cd2c5f3d4f0465a787903 SHA-256: 8a55da30c73feebb6603aa5695935fe31292296b549ddc1564df260f159b73c5
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URL leading to a suspicious domain, likely intended for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to exploit users through social engineering.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://resalured.ru/123?utm_term=chloroform+spray+for+anesthesia
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://togiwuvoze.pbworks.com/w/file/fetch/144607845/roxatepotemogexude.pdf
    • http://zosajivapesi.pbworks.com/f/94643080305.pdf
    • http://pebegijopolo.pbworks.com/w/file/fetch/144545424/mass_molar_de_feo3.pdf
    • https://uploads.strikinglycdn.com/files/a8fe7e49-27f3-46f2-b42e-0f8ec8c82b71/us_army_ranks_in_order_ww2.pdf
    • http://mapijakemifo.pbworks.com/f/22850434929.pdf
    • http://xofitesu.pbworks.com/f/descargar_adobe_illustrator_cc_2019_gratis_softonic.pdf
    • http://pobonagul.pbworks.com/w/file/fetch/144609447/nitalunupitesefewi.pdf
    • https://uploads.strikinglycdn.com/files/7a72ef25-4e85-45cb-b980-e8e4f2f5c662/bose_sounddock_series_2_weight.pdf
    • https://uploads.strikinglycdn.com/files/123ad24b-2dfb-4ae5-97d0-8b097c8b2e9d/fodigix.pdf
    • http://sisagexal.pbworks.com/f/captain_tsubasa_2020_ps4_release_date.pdf
    • https://uploads.strikinglycdn.com/files/ed4b67d7-9233-45e3-a3fa-ee3b8cc71e52/724144578.pdf
    • http://xojifot.pbworks.com/f/the_purposeful_argument_a_practical_guide.pdf
    • http://zudilazo.pbworks.com/w/file/fetch/144654879/ieee_journal_of_lightwave_technology_template.pdf
    • https://uploads.strikinglycdn.com/files/7caf0f35-fa26-403a-a83e-d9e3f6b33dd6/.pdf
    • http://fodorafirig.pbworks.com/f/que_es_el_liderazgo_democratico.pdf
    • http://mujefapufefi.pbworks.com/w/file/fetch/144607458/hossana_marco_barrientos_letra_y_acordes.pdf
    • https://uploads.strikinglycdn.com/files/36d384b5-fce2-4f9f-b7b2-34997072f89a/34298870425.pdf
    • https://uploads.strikinglycdn.com/files/9566b0c3-35c7-437c-a6ed-dc04681c5443/jivasogojikabupumepufaxu.pdf
    • https://uploads.strikinglycdn.com/files/9abd676e-13e0-4c6f-962a-112fea05c14e/81661274652.pdf
    • http://xuwajesorewo.pbworks.com/f/lamilevowonuned.pdf
    • http://gozuwef.pbworks.com/f/final_walk_through_checklist_form.pdf
    • http://barumena.pbworks.com/f/tijakikufuzatoxorotan.pdf
    • http://sejiliki.pbworks.com/w/file/fetch/144652719/77481030644.pdf
    • http://ronuzexem.pbworks.com/f/java_tutorial_oracle.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f3b3.bin
1aa359317441f1a8e3da9204bee41b958ec896ce3a20218eb5f68fcf5e212469		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF3B3 5052 bytes
font_01_sfnt_off000104c1.bin
11aeff96ac4c3a39cf8f1022d53c10d9be2fdb5d7f0eb11069494456b1f7d1e9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x104C1 14568 bytes
font_02_sfnt_off00013274.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13274 4324 bytes

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