Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab21d0788ce79522…

MALICIOUS

PDF

75.2 KB Created: 2021-01-23 07:51:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: ab2f16015578884aa0b6a061ebdb316e SHA-1: 93dbc3eb77d4d7e22e45a90643e9c9d81ad360ac SHA-256: ab21d0788ce7952279d06c64ecc06653bef0b9eeb9969e342c72653b8c87f942
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'traffking.ru'. This URL is presented in the context of a software download lure, suggesting a phishing or malware distribution attempt. The ML classifier also strongly flagged this PDF as malicious, supporting the assessment of a malicious redirector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://traffking.ru/123?utm_term=survivalcraft+1.29.17.0+apk+full In PDF document text
    • https://site-1173607.mozfiles.com/files/1173607/63596360680.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384469/normal_5fcf8363e4c86.pdfIn PDF document text
    • https://kezexawu.weebly.com/uploads/1/3/0/8/130814062/sekogep-zawofukovevaz-kapigapedogesu-gadulurek.pdfIn PDF document text
    • https://cdn.sqhk.co/mopewedote/qUhiaO6/puppet_enterprise_console_timezone.pdfIn PDF document text
    • https://mavuzoxawajike.weebly.com/uploads/1/3/0/9/130969593/tajinugu_razufosik.pdfIn PDF document text
    • https://site-1166680.mozfiles.com/files/1166680/58659145547.pdfIn PDF document text
    • https://cdn.sqhk.co/lokijuzim/NHgjheC/tiny_rifles_2_oyna.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453754/normal_5fc8dcb995174.pdfIn PDF document text
    • https://kuxijixa.weebly.com/uploads/1/3/4/8/134856984/6102979.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367964/normal_6004a0db002ae.pdfIn PDF document text
    • https://cdn.sqhk.co/lodikorep/2yWblzf/joker_ringtone_free_download_isaimini.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4406229/normal_5febd3e49a3fe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372074/normal_5fe5288f736e6.pdfIn PDF document text
    • https://cdn.sqhk.co/durotula/hkGuhgD/game_maker_studio_1._4_license_key_free.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/wobuzisibal/marksheet_ssc_part_1_2019_karachi_board.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxenipup/shell_petrol_logo.pdfIn PDF document text
    • https://s3.amazonaws.com/jixeremipet/cad_viewer-_dwg_fastview_pro_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/zibenoroduzuw/68585770472.pdfIn PDF document text
    • https://s3.amazonaws.com/wiremeresegikon/58301016907.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_off0000e023.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE023 5652 bytes
SHA-256: 83cde79a115073d5829a94b50fdf8292c43cd442f0de8ef17e51c2bea5713c84
font_01_sfnt_off0000f390.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF390 14468 bytes
SHA-256: 3ff97bde156cc94d6955df6e4b4f146f5efd59144196003323c5c34fa143b48b

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