Malicious PDF — malware analysis report

Static analysis result for SHA-256 af1079d377301e60…

MALICIOUS

PDF

68.1 KB Created: 2020-11-18 07:39:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 7bcbd92dc6ab71769b4a7c50a817fb19 SHA-1: 7fd73b412c690e29ecc926428898440ad3e982b0 SHA-256: af1079d377301e60b14a5ac112296b4b87f4dcb116b464f9772b97b823f66ef4
96 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as a phishing trojan and a machine learning classifier indicated a high probability of maliciousness. An embedded URL, https://trafficel.ru/aws?utm_term=bambukat+movie+full++free, is present and likely leads to a malicious site. The document body, though heavily obfuscated, contains text related to a movie download, suggesting a social engineering lure.

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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafficel.ru/aws?utm_term=bambukat+movie+full++free PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4393776/normal_5f939cb80a8e9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402478/normal_5f9c8cbf278f3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413126/normal_5f97312c2065d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382771/normal_5f8c7dbd6c379.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451756/normal_5fa31942eecdc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465914/normal_5fa9221235540.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/votuweroxigezog/jetozokelenaguvetajelo.pdfIn PDF document text
    • https://s3.amazonaws.com/tugumeb/eslpod_learning_guide_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/baxunaf/bhagavad_gita_chapter_16_sanskrit.pdfIn PDF document text
    • https://s3.amazonaws.com/vokeri/baki_the_grappler_manga_raw.pdfIn PDF document text
    • https://s3.amazonaws.com/najubu/calculus_1_limits_problems_and_solutions.pdfIn PDF document text
    • https://s3.amazonaws.com/salosibejodod/pearl_river_middle_school_teachers.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_off0000cf77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF77 5048 bytes
SHA-256: aa99b3b6ed3024954052dc55fe1a211ea6cdc82c15cf7ef4619f2cb254a41a4d
font_01_sfnt_off0000e09e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE09E 10376 bytes
SHA-256: 2dea3415797159aafd9834ac8cf4f8d0214cc96398fd80f1d5f8b433a1942593