Malicious PDF — malware analysis report

Static analysis result for SHA-256 16e67cdd00064c59…

MALICIOUS

PDF

71.5 KB Created: 2021-02-20 06:07:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 8e8f19a42bbeee6e45c771e9c81b328f SHA-1: 8f121f4eef4999b4df3c91847a9eb061614ed290 SHA-256: 16e67cdd00064c59813a6b2e7733f3445ec7c2bf0efa3517374f35b644fe2175
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically pointing to 'https://crophysi.ru/wix?keyword=slytherin+common+room+password+ideas'. The ML classifier also strongly flagged this PDF as malicious. While no scripts were extracted, the presence of malicious URLs and the redirector link strongly suggest an attempt to lure the user to a compromised site, likely for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://crophysi.ru/wix?keyword=slytherin+common+room+password+ideas In PDF document text
    • https://cdn.sqhk.co/linewebozid/bgighZM/dynamix_group_owner.pdfIn PDF document text
    • http://daliadiago.com/19864280360j4bo5.pdfIn PDF document text
    • http://infonewsuk.site/bafujaboluxigosinun25iu.pdfIn PDF document text
    • http://it50disconto.pro/5868884942791sai.pdfIn PDF document text
    • http://gemajesubon.22web.org/digestive_system_free_worksheets_for_grade_4.pdfIn PDF document text
    • http://ver-alex.website/8107702753jnvp4.pdfIn PDF document text
    • https://cdn.sqhk.co/xidosisew/dErgiig/mindustry_mods_github.pdfIn PDF document text
    • http://pevisokis.iblogger.org/mechanical_engineering_fe_exam_passing_score.pdfIn PDF document text
    • http://salea.site/transcribed_voicemail_androidzbo2m.pdfIn PDF document text
    • http://lalashoppen.online/zavitabanakasotogizx2ej.pdfIn PDF document text
    • http://importants.space/lepolenakebaxolikeradu2d.pdfIn PDF document text
    • http://ru-en.xyz/10189303297y2094.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lolofekigosot.epizy.com/komuvijoxeli.pdfIn PDF document text
    • https://s3.amazonaws.com/wisuw/bhojpuri_song_hd_video_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/siwixomudit/self_guided_motorcycle_tours_spain.pdfIn PDF document text
    • https://s3.amazonaws.com/zidosozawok/anti_plagiarism_en_ligne_gratuit.pdfIn PDF document text
    • https://s3.amazonaws.com/jijumupade/factual_report_template.pdfIn PDF document text
    • https://s3.amazonaws.com/dejazuvorira/custom_traceable_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/lekelepowo/88964940259.pdfIn PDF document text
    • https://s3.amazonaws.com/gogunabones/nuvifab.pdfIn PDF document text
    • https://s3.amazonaws.com/gozilum/zepeliz.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cff2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFF2 2984 bytes
SHA-256: 82c84ae5d629ebb1785ea8f4b17c1317561d86a260b8a93bb8c0017d3037a5f2
font_01_sfnt_off0000daa1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAA1 5608 bytes
SHA-256: 8a8a8004a0ddfe8caf187be52b4a6dd0ba0186a822edb89d8ba2f23020ef0a90
font_02_sfnt_off0000eda6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDA6 10084 bytes
SHA-256: 470a6dd587cf2ac212d37196d8a91c8599946304e91188e4c35e61d5fd498e98

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