Malicious PDF — malware analysis report

Static analysis result for SHA-256 475bfb86251749a2…

MALICIOUS

PDF

83.8 KB Created: 2020-12-26 02:14:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 57f408c876495fcd264cff45e5d45b12 SHA-1: 9411e54e57195ff122fc86a9d59e3528a8bb220b SHA-256: 475bfb86251749a2ec4cf2b727aea9405b7e677eeacd5e9528b1853dd906d54b
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including ClamAV detection and an ML classifier. It contains a large number of external links, suggesting a link farm or phishing attempt. The presence of embedded URLs and the overall structure indicate an attempt to redirect the user to malicious sites, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://traffine.ru/aws?utm_term=readings+in+ancient+greek+philosophy+cohen+pdf
    • https://cdn.sqhk.co/toridezoxiko/hdMXWgj/4108783134.pdf
    • https://kirewigofe.weebly.com/uploads/1/3/4/3/134382955/9460197.pdf
    • https://cdn.sqhk.co/ditetona/L9fjeFH/rode_videomic_pro_plus_vs_ntg.pdf
    • https://cdn.sqhk.co/dobopejig/ibxxiaJ/bmobile_top_up_coupon_code.pdf
    • https://pegelukiratek.weebly.com/uploads/1/3/4/5/134503056/mizojijo.pdf
    • https://bezijenogekise.weebly.com/uploads/1/3/4/8/134875893/banakuvoxobiwaf.pdf
    • https://cdn-cms.f-static.net/uploads/4366958/normal_5fa88c21957a1.pdf
    • https://cdn.sqhk.co/dadakafopina/jcUicjj/971791169.pdf
    • https://cdn.sqhk.co/minamojazi/wsvhaih/53881711182.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/piwupevivotixi/93406099625.pdf
    • https://s3.amazonaws.com/rokuwapesu/words_beginning_with_face.pdf
    • https://s3.amazonaws.com/zonivezada/name_the_cell_part_worksheet_answers.pdf
    • https://s3.amazonaws.com/tawosutosuxi/lxml_python_2._7_windows.pdf
    • https://s3.amazonaws.com/pusumowi/spades_score_sheet_printable.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010864.bin
5e3aa0241a8423844433a6a53cdaba8a77b71c4c9fd34f8d790d7948ebf1a135
pdf-font-stream PDF embedded font (sfnt) at offset 0x10864 5592 bytes
font_01_sfnt_off00011b89.bin
bef9123e2f89ed9b279ed5d1408a98cc77d375a6774e89d34fbabafe55d12613
pdf-font-stream PDF embedded font (sfnt) at offset 0x11B89 11416 bytes