Malicious PDF — malware analysis report

Static analysis result for SHA-256 3965c09db6ab29c8…

MALICIOUS

PDF

95.7 KB Created: 2021-03-30 07:32:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: c8e71e4e86126ea69efd9e2f2d4e2aef SHA-1: 20258ddfd8f735fa6e16216b55510f7389715432 SHA-256: 3965c09db6ab29c83225bf6c4882a5b9a02eb49069eb1499098765ca5d2063da
154 Risk Score

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 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://yafferge.ru/award?keyword=mongolian+shamanism+pdf In PDF document text
    • http://xufuzema.sportsontheweb.net/89001511183.pdfIn PDF document text
    • http://ueuniti.website/469120522715bgki.pdfIn PDF document text
    • http://blacklaser.ru/how_to_write_a_problem_statement_with_examplesw5ed5.pdfIn PDF document text
    • http://fixmarker.fun/1500057471b8pch.pdfIn PDF document text
    • http://kinoxca.xyz/house_of_leaves_detailed_summaryn9pc9.pdfIn PDF document text
    • http://trokot-online.xyz/acting_lessons_apkecgfh.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://ropupifalapoges.atwebpages.com/why_is_my_maytag_dishwasher_not_cleaning.pdfIn PDF document text
    • https://s3.amazonaws.com/limepusotanal/38484388787.pdfIn PDF document text
    • https://s3.amazonaws.com/muvarelo/holy_quran_simple_arabic.pdfIn PDF document text
    • https://s3.amazonaws.com/jesidofefe/tipos_de_catalizadores_quimicos.pdfIn PDF document text
    • https://s3.amazonaws.com/wixatax/characterisation_of_nanomaterials.pdfIn PDF document text
    • https://s3.amazonaws.com/resabomibogodaw/who_is_maze_father_lucifer.pdfIn PDF document text
    • http://pejenusiloxo.rf.gd/54812343184.pdfIn PDF document text
    • https://s3.amazonaws.com/rujabepifar/amsco_ap_human_geography_answer_key_chapter_6.pdfIn PDF document text
    • https://s3.amazonaws.com/xirixepo/52549304625.pdfIn PDF document text
    • http://runodeb.rf.gd/background_images_for_photoshop.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_off00011ffd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FFD 4256 bytes
SHA-256: 934adb715209733224277f34a79e239b5669f2ce9642087e3ba05f2f1748add9
font_01_sfnt_off00012ee8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EE8 5364 bytes
SHA-256: b8d20b7545fe58d29bf490ce6832def12f559830126aa94b266a89b50ed08126
font_02_sfnt_off00014110.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14110 15876 bytes
SHA-256: f03c18a26341531acdc8401753d26374120a4007045da702844d6dd312e1d6d0

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