Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec2e9df340553a30…

MALICIOUS

PDF

70.9 KB Created: 2021-01-20 22:29:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 8c212c62be0e76efe7e35f15c9cbf92e SHA-1: da5108de820ca1e2c7350bbaab6806841f302baf SHA-256: ec2e9df340553a30041d7d1dd7053ab62362272c0f9897f40e81675abc0773a6
214 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, including a known malicious redirector, suggesting a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains text related to drawing tutorials, likely serving as a lure. The presence of multiple PDF links and a malicious redirector indicates a link farm or redirection strategy to host malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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.
  • 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://ggtraff.ru/123?utm_term=how+to+draw+a+baseball+player+catcher In PDF document text
    • https://nedotumawu.weebly.com/uploads/1/3/4/6/134626041/terevaboma.pdfIn PDF document text
    • https://site-1251254.mozfiles.com/files/1251254/birthday_gif_videos_free.pdfIn PDF document text
    • https://site-1228341.mozfiles.com/files/1228341/busuxigedededilate.pdfIn PDF document text
    • https://noruwapawufibem.weebly.com/uploads/1/3/0/9/130969999/jokuzovitolu.pdfIn PDF document text
    • https://site-1180826.mozfiles.com/files/1180826/brutal_street_2_mod_apk_unlimited_gems.pdfIn PDF document text
    • https://site-1237262.mozfiles.com/files/1237262/guided_access_ipad_pro_2018.pdfIn PDF document text
    • https://kakowafalajoji.weebly.com/uploads/1/3/4/4/134455686/zimedudos-mivifuxunewif-xagukizupime.pdfIn PDF document text
    • https://site-1244485.mozfiles.com/files/1244485/vce_literature_examiners_report_2017.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/xutomoxu/bolotafatefuvi.pdfIn PDF document text
    • https://s3.amazonaws.com/jedobufudajewu/vexor.pdfIn PDF document text
    • https://s3.amazonaws.com/jajoxulabojaso/8959104228.pdfIn PDF document text
    • https://s3.amazonaws.com/gimufesajo/huawei_mate_20_lite_android_9_frissts.pdfIn PDF document text
    • https://s3.amazonaws.com/fizaxo/hannover_rueck_se_malaysian_branch_annual_report.pdfIn PDF document text
    • https://s3.amazonaws.com/baxekojojexusol/silopizojeralajumeso.pdfIn PDF document text
    • https://s3.amazonaws.com/divikufifir/wapking._com_2018_video_song.pdfIn PDF document text
    • https://s3.amazonaws.com/godoremitiwuja/14310382435.pdfIn PDF document text
    • https://s3.amazonaws.com/latufenaw/asme_y14_5m_2009_tolerance_chart.pdfIn PDF document text
    • https://s3.amazonaws.com/bupaxomu/halloweentown_full_movie_in_tamil.pdfIn PDF document text
    • https://s3.amazonaws.com/lorifawuvawot/ics_200_student_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/sasufufa/92603879922.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_off0000d6cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6CF 5456 bytes
SHA-256: b164bbde29835c60ab37421fc25ac446aa20f35af2ee244f1c6e25869f0f5d03
font_01_sfnt_off0000e960.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE960 10868 bytes
SHA-256: fd3a0520f8232e4dc63328e68fec4de983cbaeca1eafaaa7c8f5de4960415d59

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