Malicious PDF — malware analysis report

Static analysis result for SHA-256 a9d03c89d4471c2c…

MALICIOUS

PDF

76.8 KB Created: 2020-12-28 13:35:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 5e42af3df5d2744ecf970422b472a87a SHA-1: 1a2caea0838857c71a34323b605af0f9f0deae19 SHA-256: a9d03c89d4471c2c75a05c71e9cb8e39cd90ca00a02ed766963d9099b809e821
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

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/strik?utm_term=ethiopian+coffee+incense In PDF document text
    • https://cdn.sqhk.co/tiwumixe/2jahiQQ/88493895561.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/e80dbc82-3ade-4fa2-aa26-68148592eedd/fantasia_2020_lineup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/30a7a925-497e-40e1-8fd6-a58753aafb6b/60489647923.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e669bea6-b4bb-4e3a-8b5c-43e31bacde21/69850542375.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8dd12967-21ae-4ba0-84bb-c4443cb85a49/aday_retmen_4_a_formu_doldurulmu_rnei.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7eff44d0-9c4c-4483-9fac-b04e58f5ae2c/62826440064.pdfIn PDF document text
    • https://s3.amazonaws.com/zurovajij/15647351422.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cfe58530-a96a-4b62-be9d-46fbc681322b/11361854238.pdfIn PDF document text
    • https://s3.amazonaws.com/dazutun/treasure_hunt_clues_and_answers_for_adults.pdfIn PDF document text
    • https://s3.amazonaws.com/bomupi/all_audio_converter_pro_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/06821515-d602-4046-86c3-70fcfa11aa5f/casio_pathfinder_manual_3246.pdfIn PDF document text
    • https://s3.amazonaws.com/rojalexipokadaz/17355384974.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/756fb350-d8d7-4741-b7e5-4e030303a3c5/ludo_star_2_hack.pdfIn PDF document text
    • https://s3.amazonaws.com/gosete/79918049107.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b11a27ac-4fcd-453b-95e4-5cecfd2b0e76/65274433633.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b3abd376-32b8-4bd9-a42b-d6d63ee05a1c/zesepijelolezetojidoxuj.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn 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_off0000d904.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD904 8788 bytes
SHA-256: dac6928a3127e22e84fea1c9dd122bd1825214bb0968c9fffed05c9e1eccb3f3
font_01_sfnt_off0000f014.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF014 4932 bytes
SHA-256: 4561ba2d462cb61f7fc8b0f2e9927ad58735a000c54cd98ee9c258c0b4d441d6
font_02_sfnt_off000100e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100E5 11416 bytes
SHA-256: a29e0b198733575f86c5ebeb1c6b0a979dc3e1d2f879f6638b8d5f06f7311123

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