Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ca33e04863b102b…

MALICIOUS

PDF

75.8 KB Created: 2021-02-08 16:47:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 08232d186f83cd0e92a5741a3f71e0ad SHA-1: 924edb66d060873dfea89f28736afd6b8564ecd6 SHA-256: 7ca33e04863b102bd4c3cabe13bac3399893c3576b5c3975128e7745898fe17f
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, flagged as a 'PDF_SEO_LINK_FARM'. One of these links, 'https://leonvi.ru/123?utm_term=diy+air+compressor+from+ac+compressor', is classified as unknown reputation, suggesting a potential malicious destination. The ClamAV detection and ML classifier further indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/123?utm_term=diy+air+compressor+from+ac+compressor PDF link annotation
    • https://lerekisisag.weebly.com/uploads/1/3/1/4/131408666/375d1d112.pdfIn PDF document text
    • https://cdn.sqhk.co/gulifunanale/RBibwjg/fruity_unicorn_slush_maker_slushy_drinks_cooking_light.pdfIn PDF document text
    • https://lesivemiseleji.weebly.com/uploads/1/3/1/3/131381961/4555447.pdfIn PDF document text
    • https://cdn.sqhk.co/toromerepowa/hYijmgi/swish_hoop_light.pdfIn PDF document text
    • https://cdn.sqhk.co/rinilafexowi/cehat0t/jopedufigazamiw.pdfIn PDF document text
    • https://cdn.sqhk.co/dewavasese/bjbicQA/91813204584.pdfIn PDF document text
    • http://sosyaltakipcipanelin.com/genigujeraxojemulazanigzw0t.pdfIn PDF document text
    • https://kuvugelovusilu.weebly.com/uploads/1/3/4/4/134437140/getuxe_kapixatuliwe_fozikedaviwabe.pdfIn PDF document text
    • https://cdn.sqhk.co/wibetaxor/nibjamc/dagawonijexuvakekikese.pdfIn PDF document text
    • https://cdn.sqhk.co/xivorotil/ric2Pgh/wafisonivulotul.pdfIn PDF document text
    • https://cdn.sqhk.co/wezupobuwab/gKLrSgf/transport_tycoon_wiki.pdfIn PDF document text
    • https://cdn.sqhk.co/pasojixaju/gdicROy/train_sim_builder.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/dalava/christmas_music_trivia_questions_and_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/metakibeme/delete_row_in_google_sheets_app.pdfIn PDF document text
    • https://s3.amazonaws.com/satudifin/conduction_convection_radiation_definition.pdfIn PDF document text
    • https://s3.amazonaws.com/xirixepo/internet_speed_meter_pro_apk_onhax.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_off0000eaa8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAA8 5232 bytes
SHA-256: e68e6a75b32e579f70020146dc199d3a97cafc2397bd6da471592a2e2c5b8647
font_01_sfnt_off0000fc71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC71 11196 bytes
SHA-256: 3cdcf503b8cb0789b5d970a9fabfb719fbf7f738e6769a7f581cd7272f39fb20

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