Malicious PDF — malware analysis report

Static analysis result for SHA-256 becc336b915bccef…

MALICIOUS

PDF

61.6 KB Created: 2020-11-29 15:58:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 05c9315747d688ace7074eb953af9b81 SHA-1: 70ae191faaa7cea099967291eccab40edcaf663f SHA-256: becc336b915bccefd9eba95689d505e788e4542e3928a812ab9aa3387eeb7854
154 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'https://traffine.ru/123?utm_term=bob+goff+everybody+always+study+guide'. This indicates the document's primary purpose is to redirect users to a potentially harmful site, likely for phishing or malware distribution. ClamAV also detected the file as 'Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0', further supporting its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://traffine.ru/123?utm_term=bob+goff+everybody+always+study+guide In PDF document text
    • https://cdn-cms.f-static.net/uploads/4413227/normal_5f9e371f36cc1.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/28f78676-6224-4bc4-90ea-72de49c4b7b4/all_we_know_is_falling_lyrics.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd88ea75-54b1-45df-be37-08cfe436f51f/chat_rooms_software_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a08ccdc-da3b-4e91-a6d2-cd0fdc8cbdbd/rurerovibo.pdfIn PDF document text
    • https://s3.amazonaws.com/jarawaxanivu/xasovevufupefesor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a478166-ca9a-4c22-9513-77e500920dc8/65391896231.pdfIn PDF document text
    • https://s3.amazonaws.com/popagexexoza/gojinugudujivorekuja.pdfIn PDF document text
    • https://s3.amazonaws.com/sazomo/english_to_spanish_body_parts_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/nawuvud/asco_antiemetic_guidelines_2018.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e11a19dc-5a0d-4cfb-a410-efa372af5b49/freaky_letter_to_boyfriend_in_jail.pdfIn PDF document text
    • https://s3.amazonaws.com/sesafefanulokam/websphere_message_broker_v8_tutorial.pdfIn PDF document text
    • https://s3.amazonaws.com/vifusupegiza/dukekozapanota.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_off0000b302.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB302 5516 bytes
SHA-256: 7238c40a2aa8d07cd2dc915aaafc233b34e7911108964cf2f56dcd5b0ba5a263
font_01_sfnt_off0000c5fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5FA 10384 bytes
SHA-256: 059eea9aa8be85d4b30f56b8547b57668a15846dca597646ac78391c029f89c4

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