Malicious PDF — malware analysis report

Static analysis result for SHA-256 28632338b0379b95…

MALICIOUS

PDF

84.6 KB Created: 2021-04-07 00:18:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 9d35b10e82219e81df2ae1a4677e5f0f SHA-1: 2b5c6d3b3919cd4950dc938ae7fb648a5b658671 SHA-256: 28632338b0379b954e550b37545367b0428e2c787921e5d709fc0080f7246bc6
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a phishing lure designed to redirect users to malicious infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://crophysi.ru/award?keyword=christmas+songs+choir+pdf In PDF document text
    • http://lnstagramoriginal.com/76824992423pftro.pdfIn PDF document text
    • https://cdn.sqhk.co/ximosufi/hehbmFj/arcade_family_chromecast_games_ios.pdfIn PDF document text
    • https://cdn.sqhk.co/zofizitene/ujgjcOC/55413188448.pdfIn PDF document text
    • http://www-sfr-fr-monespace.com/zajuxedafopekexinaqzrax.pdfIn PDF document text
    • https://cdn.sqhk.co/zimopaji/hTjeigm/ripulafojinurujolel.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/0e59bdfd-e984-4536-8893-9222a41edf95/introduction_to_law_enforcement_textbook.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/115418ea-870e-4beb-9276-256aad1b5618/what_is_a_good_curriculum_for_preschool.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4bb3010e-6ea7-4119-ad7c-f689c0c5aec4/coding_the_matrix_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c5940e93-0a4a-42ce-b26d-18a8fe22128d/how_to_connect_ps4_controller_to_dolphin_mac.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9078f629-6e27-41a8-9a58-8918cdf4c4fd/technivorm_moccamaster_kbg_741_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/249cb1dc-a169-4c4c-bee3-2bcea2f7681e/the_hunger_games_full_movie_free_download_in_hindi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bec8a598-a7de-4525-b005-1977dd9d6e6c/what_is_usability_in_health_information_systems.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/49c1047c-9127-4061-ad36-d6a2fe6c2b23/what_does_an_international_marketer_do.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/079a1430-ad92-412c-b0f0-588bdfa48619/what_to_look_for_when_buying_a_used_caravan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e72ef4cb-eaa7-401d-84e8-698e7f168395/zig_zag_road_san_francisco.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/21897e54-50b6-4427-a739-8d45f2369100/timex_ironman_indiglo_chronograph.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de0b32e4-f5f2-4fb3-aefa-b5abfc710f94/tokita.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7345c0ae-0ced-4d10-b2c8-8375c5798abf/mous_iphone_11_pro_max_case_australia.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f98d6f9-5915-4a70-bb76-c634fd39955d/xfinity_cable_box_fee.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/24f1edd8-59ed-4cf2-a3e8-aadb4c8c87e4/82499140713.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa661dc6-15bb-412f-a0b4-4b6241eb34b1/79352964917.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e297dbed-7a1f-4eae-bc12-43c5a5735d3e/lanatesapakowiromafeso.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_off0000f6aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6AA 5440 bytes
SHA-256: 36b10421469c78285cde29232ff3eae633ccbbec8cc683ac4f938a03e01c293a
font_01_sfnt_off000108fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108FE 10684 bytes
SHA-256: 15ddec26b90b4850356e7a4f5ed4f6593f9f617cd5d7684b9b1912cd58cafc91
font_02_sfnt_off00012d8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D8D 16312 bytes
SHA-256: aad9bc0f36eadc3314e08670b59090120051e308b357201f134af3d0b781b2b0