Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb13f0a0fe177075…

MALICIOUS

PDF

422.2 KB Created: 2021-05-03 03:39:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 8f926e220be2d6e5eb1b8807512acbb3 SHA-1: bde7bbd07e1f318d5d7cd0db0d32d00beba10210 SHA-256: cb13f0a0fe1770754acf58ee74478d659a4e5845edaa2d1d4a2088ce5990f77d
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to a suspicious domain, which is likely used to host a phishing page or download a secondary payload. The document body, though heavily obfuscated, suggests a lure related to a specific PDF title, reinforcing the phishing or malware delivery vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9320

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://leonvi.ru/strik?utm_term=dark+angels+3rd+edition+codex+pdf PDF link annotation
    • http://filozajerezabi.getenjoyment.net/autonomous_learning_theory.pdfIn PDF document text
    • https://nabiwadi.weebly.com/uploads/1/3/5/2/135298838/59eecac4021831.pdfIn PDF document text
    • https://zasubimivari.weebly.com/uploads/1/3/1/3/131383839/4961865.pdfIn PDF document text
    • https://cdn.sqhk.co/zadorari/bNjijge/wikiwalagafowagor.pdfIn PDF document text
    • https://webuwexuzebonal.weebly.com/uploads/1/3/0/7/130775053/59650.pdfIn PDF document text
    • http://vvd.bar/nfl_sunday_ticket_streaming_only_pricep3psv.pdfIn PDF document text
    • https://cdn.sqhk.co/fosojatesog/gjbHPDK/fipok.pdfIn PDF document text
    • http://supobesopo.mygamesonline.org/use_of_articles_in_english_grammar.pdfIn PDF document text
    • http://kieverts.xyz/skymet_weather_report_for_mumbai_maharashtrauhuou.pdfIn PDF document text
    • https://cdn.sqhk.co/xuvisisitinu/iT95gjo/60238099751.pdfIn PDF document text
    • https://xukovefekafevut.weebly.com/uploads/1/3/0/9/130969731/e95f10.pdfIn PDF document text
    • https://cdn.sqhk.co/xibetevoxaj/jd4jggg/business_support_officer_jobs_near_me.pdfIn PDF document text
    • http://pakirekugep.scienceontheweb.net/zibilon.pdfIn PDF document text
    • https://cdn.sqhk.co/fowipovoji/IheThif/z_nation_cast_season_2_episode_11.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/baxegezivumi/stone_soup_recipe_crock_pot.pdfIn PDF document text
    • https://s3.amazonaws.com/xukirizugukugi/53035936814.pdfIn PDF document text
    • https://s3.amazonaws.com/livivuvuwugeb/lelux.pdfIn PDF document text
    • https://s3.amazonaws.com/wunojipu/unir_archivos_en_uno.pdfIn PDF document text
    • http://forojiwimudobo.atwebpages.com/78530909719.pdfIn PDF document text
    • https://s3.amazonaws.com/xonaxevetaf/nasubora.pdfIn PDF document text
    • https://s3.amazonaws.com/nasitevu/49261257756.pdfIn PDF document text
    • http://rukosivujuxu.atwebpages.com/mapa_de_estradas_sao_miguel_aores.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_off00064cf0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64CF0 5620 bytes
SHA-256: cf6b6bbf0dcaf166b0cb83cd4fbfe0f574ff0f51c2e98cb5cd3862ee9d442884
font_01_sfnt_off0006602f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6602F 11728 bytes
SHA-256: b9b7e737580f69292175e6c5fbda21786d2e861fbc8cd1ef1a47852d691ad95d

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