Malicious PDF — malware analysis report

Static analysis result for SHA-256 04cd99fc2eae4248…

MALICIOUS

PDF

78.0 KB Created: 2021-04-16 02:48:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: f4a9d32ffa4b79642bf41c7bef537906 SHA-1: 9e077c92c3deee3b5af9f8c8476b146eb0d85eb4 SHA-256: 04cd99fc2eae4248b0ef4fcbf9fbafa9ac7c3bae3ef3e95027cea8d2dfdd67f7
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains an embedded URL that leads to a suspicious domain, likely serving as a lure for phishing or malware distribution. The document body, though heavily obfuscated, appears to be a garbled attempt to mimic a search result, further supporting a phishing or social engineering attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://mezovuduw.ru/strik?utm_term=what+is+the+healthiest+meal+at+buffalo+wild+wings+on+thursday PDF link annotation
    • http://lapiwudoxavov.scienceontheweb.net/analise_combinatoria_arranjo_e_combinao.pdfIn PDF document text
    • https://cdn.sqhk.co/nakolore/3Yhaqgf/sojewadiwexifed.pdfIn PDF document text
    • https://cdn.sqhk.co/letarezetap/BgfBgji/jidetur.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/740aaf1f-7d16-40fa-beda-d9406cc503b3/fowabut.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c2cf1c0-544d-4cf3-b877-bf2ec9bd7c47/92927997312.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/45be6c10-640d-440f-9c11-3b21f077dec8/brother_p_touch_label_maker_model_pt-h100.pdfIn PDF document text
    • https://s3.amazonaws.com/gatazeromij/91280676480.pdfIn PDF document text
    • https://s3.amazonaws.com/seriposuj/wolovukamosuvog.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd89465b-504d-4cd3-9826-78367ff645d1/49549134843.pdfIn PDF document text
    • http://ranitirunom.myartsonline.com/beauty_in_mathematical_proof.pdfIn PDF document text
    • https://s3.amazonaws.com/falejogajir/json_multipart_form_data.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a36d058-d97a-47f0-9701-b7f0f2dab5ed/craftsman_24_snowblower_repair_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c9bff860-cf81-4b37-a937-1b44bb34db5f/best_business_books_wall_street_journal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c565d948-2f04-4b13-8d70-d814bc4acce4/how_to_scan_film_with_epson_v550.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f0fe804c-52f4-4352-9d9a-d9b9d903cfd4/why_schools_should_not_have_uniforms_essay.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/30a9e987-573d-48b5-a4d5-9dbc0d433327/what_is_the_difference_between_autocad_and_inventor.pdfIn PDF document text
    • https://s3.amazonaws.com/tumuzu/lagu_mungkin_cover_feby.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d425542c-9133-48c6-8479-d484c487a9f1/35933658959.pdfIn PDF document text
    • http://lolunoxij.myartsonline.com/important_abbreviations_download.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_off0000ef6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF6F 5668 bytes
SHA-256: f6709121f7586f3424a636d104acd7a41ce7b41ea29e6e2d22195d3a9a1527fd
font_01_sfnt_off000102a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102A6 11744 bytes
SHA-256: 2423c4644c872a08427885ad942a6d79591d9a875b3801a4c41485acd8506ff4

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