Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4ea58104620283b…

MALICIOUS

PDF

68.2 KB Created: 2020-12-01 22:05:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 3a76250f0bd944b7c4f852f0a2ec2fa5 SHA-1: 78ae31bae188ade1b4596ad1994718c21a33b74e SHA-256: f4ea58104620283b0241578b8962fae0ba1c5141aa779f7def852a37c261e6d0
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://cctraff.ru/123?utm_term=volunteer+in+spanish+fork+utah'. This URL is likely used to phish credentials or deliver further malware. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the presence of a malicious URL in a PDF strongly suggests a phishing or credential harvesting attempt.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://cctraff.ru/123?utm_term=volunteer+in+spanish+fork+utah In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://static1.squarespace.com/static/5fc13c726609fd0ee793905a/t/5fc37b02f3de5e49b5d0c358/1606646530745/sosufununavazifewedob.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcf5753fdc31513a0eef6c/1606219125882/jokewogimuzazeb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/480bae7b-c299-492e-8593-a6cf35ece5b9/nazikizam.pdfIn PDF document text
    • https://s3.amazonaws.com/sivanira/79270624708.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf5fc7cb3e0f5771471221/1606377416161/rawuzopibozarulode.pdfIn PDF document text
    • https://s3.amazonaws.com/dorobukasawituw/metformin_xr_500mg_cost.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0f79e2e34347c7044618a/t/5fc3ce6818e72e5fdb4c4401/1606667881021/i_spy_treasure_hunt_book_answers.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc10620bf71053ccb10dd13/t/5fc377775147b148049f7220/1606645624356/piano_tiles_2_hack_apk_latest.pdfIn PDF document text
    • https://s3.amazonaws.com/dobikasukavu/angular_material_icons_svg.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ce39d16-66be-43f3-9817-ccf4ec4d1292/61870754814.pdfIn PDF document text
    • https://s3.amazonaws.com/wizitifowubux/pexutopu.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbdf3953570fb44d1c8743e/1606284181564/minecraft_force_op_unban_tool.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/05118a0d-d1e7-4baa-9a5b-2fabcc8f8f7c/shaadi_me_zaroor_aana_full_movie_onl.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0d12c3dfdd95b60d4a66f/t/5fc2127e3485235c860e48c9/1606554238880/counter_height_dining_table_butterfly_leaf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ccb4efa-9041-425f-9836-6e8e8683db2d/dipopikaroj.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c30f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC30F 4900 bytes
SHA-256: 8c742ef0b1d01d3eb4e0c6d6c8acf2c9f945f07bf682abda4120e7fa2d2335ce
font_01_sfnt_off0000d3ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3AD 9952 bytes
SHA-256: 50dbae4bbc7d892a84a399d42b12a9ea659c05e8b5fc66f303309ccffbce00c5
font_02_sfnt_off0000f5bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5BF 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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