Malicious PDF — malware analysis report

Static analysis result for SHA-256 af7a187b905eb740…

MALICIOUS

PDF

66.8 KB Created: 2020-11-30 10:11:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-24
MD5: e594db3f4d30b618dc91e183cb7ff0da SHA-1: dc2a0eb3f31fa3cf0b7bd1400370b04cdab98d1c SHA-256: af7a187b905eb74088ca834fdbcf63fdcd5f3bbe390d4fdf649e4a20de06983b
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=colonel+joe+jackson+death'. This URL is the primary indicator of malicious intent, likely leading to a phishing page or malware download. The ML classifier also strongly flagged this PDF as malicious, supporting the assessment of a phishing or malware distribution campaign.

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=colonel+joe+jackson+death In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/daselex/babivub.pdfIn PDF document text
    • https://s3.amazonaws.com/ganubifirigevi/ames_lettering_guide_3_8.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/80f67add-2012-47d0-a73e-2b27521d2c1b/99321481882.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2140c554-e3ab-45a4-af84-0cef814c4c08/everybody_writes_download.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbffea5239b0722912c2f3a/t/5fc0e41c9b1ed03538fc38a2/1606476833745/sunken_city_mousehunt.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ea4196c-d060-4968-9d24-37849fa035cb/aube_thermostat_manual_th115.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc1961a60f2895dc1ecb911/t/5fc42517e18c5c478e7dea62/1606690073116/fuxuvetamanufa.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf6643173fb5383b9a72d8/1606379075454/91376063314.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe1727e6d49a06bb5969cc/1606293287936/clash_of_clans_private_server_download_2020.pdfIn PDF document text
    • https://s3.amazonaws.com/kudefem/mokukirumemabujopif.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7557dc3c-2ed2-4a1a-838a-45442c50bebf/nefoduwetoxuzapodewaj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/308a83df-e0da-4f5c-9eba-b464c6df0bdd/economics_eoct_mother_of_all_study_guides.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc13e7dd49dd12447366960/t/5fc299369ee0f32b87a7cc52/1606588727819/34070509878.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0ea21e2fce462bc8c0024/t/5fc28979bc819f1cf42ae902/1606584698801/tipatorifozom.pdfIn PDF document text
    • https://s3.amazonaws.com/povodijirig/tekezivipet.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_off0000ca50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA50 4976 bytes
SHA-256: 467ab7d30d4adcd962da4e6fe9b399b82cadca1b737f9cc3d68599041e3b1e64
font_01_sfnt_off0000db36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB36 10564 bytes
SHA-256: 3fd424f53926e1ba147ccb54e272e37035cd79089281ac82274311ba5db56c80

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