Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1fb098d33460337…

MALICIOUS

PDF

77.8 KB Created: 2021-04-02 13:09:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 0eef92c45add29d4a283e752b82189c2 SHA-1: d189b0432f4327aa9118e358bf606d8f9cef012d SHA-256: e1fb098d33460337f7b9b4837e71095e2054d259c147440a32af3b00ffa89dbf
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, likely intended to deceive the user into believing it is a legitimate search result. While no scripts were explicitly extracted, the PDF format often utilizes JavaScript for malicious actions, and the presence of embedded URIs suggests an attempt to redirect the user to a malicious site.

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://seumenha.ru/wix?keyword=biochemistry+basics+pogil+answers PDF link annotation
    • https://cdn.sqhk.co/wajewukudino/igigd82/i_godinger_co.pdfIn PDF document text
    • https://cdn.sqhk.co/jawefujivi/dwieeUn/famous_colorful_coloring_books.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425784/normal_5fe10cf4a3e3b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420767/normal_605f646b1e1e9.pdfIn PDF document text
    • https://cdn.sqhk.co/gitopedevid/hdiihc0/funny_message_alert_sound_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/jaxogubajo/41hhwhf/set_format_date_input_html.pdfIn PDF document text
    • https://cdn.sqhk.co/nobipajami/nKahdhd/2699023024.pdfIn PDF document text
    • https://cdn.sqhk.co/baresupujar/gchagdJ/61067244796.pdfIn PDF document text
    • https://cdn.sqhk.co/tedigedubemi/ggJhfgd/catan_dice_game_instructions.pdfIn PDF document text
    • https://cdn.sqhk.co/letareximo/3ggQjet/61095458818.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/lazolu/icd_10_alphabetical_index_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/ditiruz/75558131739.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/11231893-7c62-4de3-8267-cc44f05bc1b0/vuludawaletagedoporo.pdfIn PDF document text
    • https://s3.amazonaws.com/zedudo/seriretigogamuw.pdfIn PDF document text
    • https://s3.amazonaws.com/fekaduvopigab/star_trek_enterprise_season_1_episode_16.pdfIn PDF document text
    • https://s3.amazonaws.com/divelikubapiwaj/body_building_hd_photos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a8f6498-51ca-4a24-bfad-b774d8eb6b1a/93368356421.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000da5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA5A 5732 bytes
SHA-256: 7fbd27f79590838e8d6b89841aef34ef1c4bddb746cb0809c98f61c2e7657e1d
font_01_sfnt_off0000edca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDCA 11388 bytes
SHA-256: 414724462d52a92c223f8f16641206187e4d1a36dd04aee51689f0281bc92dec
font_02_sfnt_off0001143e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1143E 16188 bytes
SHA-256: 357b6184bc20a3f7449b02d77f6fdbcc15c38ba9f4c11aa94ffbf0c2f0ff3bf3

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