Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ab1d24ea2047ae8…

MALICIOUS

PDF

71.6 KB Created: 2021-04-06 05:18:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: d31b1315ba5869a2918cfa7277e3bbe2 SHA-1: ec75e3ab4a766cf1a34eabb93aae811b4e1ee9c2 SHA-256: 3ab1d24ea2047ae85c5396ce18b646b8e4f8b1f0242170124693e0b0b494d214
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 it functions as a link farm to distribute other malicious content or phish for information. The presence of embedded URLs and the overall structure strongly indicate a malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://soxebez.ru/award?keyword=caballo+de+troya+9+completo+pdf PDF link annotation
    • https://cdn.sqhk.co/tijatabov/9ex4Fid/emergency_alert_system_application.pdfIn PDF document text
    • https://cdn.sqhk.co/rodesedaded/gfhbbih/joxobigidudiku.pdfIn PDF document text
    • https://cdn.sqhk.co/javeduner/d7hehjy/highwaymen_movie_true.pdfIn PDF document text
    • https://cdn.sqhk.co/kagalitisup/ji8gdAE/blood_and_glory_2_ios.pdfIn PDF document text
    • https://cdn.sqhk.co/vopofuxo/uV6zgei/35073410646.pdfIn PDF document text
    • https://cdn.sqhk.co/javabufe/ojjKhhL/57190296551.pdfIn PDF document text
    • https://mewuvirinikupu.weebly.com/uploads/1/3/4/5/134505229/8753790.pdfIn PDF document text
    • https://powudeli.weebly.com/uploads/1/3/4/7/134772307/b88a7.pdfIn PDF document text
    • https://cdn.sqhk.co/zosiwikiw/5ibMifx/kolukonopemarewutawiregad.pdfIn PDF document text
    • https://cdn.sqhk.co/gosukutusu/jjjjr8e/66330809482.pdfIn PDF document text
    • https://cdn.sqhk.co/jenotefi/jdAihcT/koxabozaxev.pdfIn PDF document text
    • https://rejonogatu.weebly.com/uploads/1/3/5/3/135392998/8912417.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4530151/normal_5fd3afad6d5e5.pdfIn PDF document text
    • https://dekedenavit.weebly.com/uploads/1/3/4/6/134612093/8089460.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446162/normal_6010f579063b1.pdfIn PDF document text
    • https://cdn.sqhk.co/vozogekom/9Yiegfb/jakutususulaxaxamawumib.pdfIn PDF document text
    • https://cdn.sqhk.co/zarepowake/hrhgYYk/average_walking_pace_calculator.pdfIn PDF document text
    • https://cdn.sqhk.co/dixejetafap/fKMbdK6/23742803559.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/a91af0e7-bbe1-4801-8bcf-7125b74a08ea/jofegakikosewezinovaninem.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d05eda4-0c28-4bef-bbc5-2ee62153f0f5/89478941370.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_off0000d5af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5AF 5428 bytes
SHA-256: 12515a2ff20172c8649ca385205c5200b6257e8f01051f4cacde4a8aedeb9ac0
font_01_sfnt_off0000e80f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE80F 12180 bytes
SHA-256: f871305a209766728d7c137293f61ad58e102c12ae2d977ce5d0e669d1ebc91e

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