Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8ba3ad88d7b87df…

MALICIOUS

PDF

78.1 KB Created: 2021-01-17 19:15:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 8a9d9cddc825f92c5e1a0e7ebcead169 SHA-1: be6af6f711818fe172eccd38280ff9bb288a7f54 SHA-256: a8ba3ad88d7b87dfc29893f69e07c011540af72dfe70231f65ad9cda9f0f02c8
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 0.9998

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://gettraff.ru/123?utm_term=private+placement+memorandum+template+singapore In PDF document text
    • http://wavasesinile.22web.org/word_puzzle_games_for_android_phones.pdfIn PDF document text
    • https://site-1175792.mozfiles.com/files/1175792/alliance_alive_3ds_guide.pdfIn PDF document text
    • https://site-1244465.mozfiles.com/files/1244465/bleach_mobile_3d_mod_apk.pdfIn PDF document text
    • http://mekozeka.66ghz.com/88039721405.pdfIn PDF document text
    • https://site-1172223.mozfiles.com/files/1172223/sumit_bengali_font_free.pdfIn PDF document text
    • https://site-1192441.mozfiles.com/files/1192441/android_api_request_permission.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/sedimeraxufi/wenaropebaf.pdfIn PDF document text
    • http://gojofim.epizy.com/astronomical_almanac_2020.pdfIn PDF document text
    • https://s3.amazonaws.com/kavugusepe/nokogodabas.pdfIn PDF document text
    • http://davafegi.epizy.com/how_to_authorize_itunes_s_on_computer.pdfIn PDF document text
    • http://javasuk.epizy.com/86287945677.pdfIn PDF document text
    • https://s3.amazonaws.com/zosevid/univision_deportes_network_xfinity_channel_number.pdfIn PDF document text
    • https://s3.amazonaws.com/wunupalezozerud/75726328006.pdfIn PDF document text
    • https://s3.amazonaws.com/dusined/dodalubuxasufuvavagemes.pdfIn PDF document text
    • https://s3.amazonaws.com/zisulamisozoto/24705242034.pdfIn PDF document text
    • http://fonimegalidoxu.epizy.com/ebay_dropshipping_guide_with_no_inventory.pdfIn PDF document text
    • https://s3.amazonaws.com/paxuvagal/26688412999.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_off0000f4e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4E6 5456 bytes
SHA-256: 264d0c4e8f9c4fa3db2f00f2d10b1de62f4b6dbada86724c6b9504fa6ad458f6
font_01_sfnt_off00010766.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10766 10356 bytes
SHA-256: dedf7df9f51d37bc6aae096bf1a657442c82083425f8149619d02357dfeb1ee5

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