Malicious PDF — malware analysis report

Static analysis result for SHA-256 62bc7fd07a3724fb…

MALICIOUS

PDF

83.1 KB Created: 2021-03-17 18:55:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 66f0c54e1e8b4d77d6bab73966d70d33 SHA-1: cd708dd04287756c2aaa0cf9bcbb50d82b40961e SHA-256: 62bc7fd07a3724fb81d51fe262c27bb5fb4a9dfae0154de8307f07f7663d5cb8
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 'dafemum.ru'. The embedded URL is likely intended to lead the user to a phishing or malware distribution site, disguised as educational material. No scripts were extracted, but the presence of a malicious URL and the ML classifier's high confidence indicate a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://dafemum.ru/wix?keyword=florida+interactive+science+book+6th+grade In PDF document text
    • http://wiinorama.website/blitz_buggy_racing_mod_apktlzgs.pdfIn PDF document text
    • http://familyit.pro/65642869533ds65o.pdfIn PDF document text
    • http://helplnstagram-confirm.com/brescia_calcio_formazione_20015csp4.pdfIn PDF document text
    • http://giwodusab.iblogger.org/17516331757.pdfIn PDF document text
    • http://testrun.ru/the_outsider_episode_synopsisj3nwu.pdfIn PDF document text
    • http://meetsucre.pro/jefoporamexevam7r5bk.pdfIn PDF document text
    • http://beautysss.site/91701565468yf8lu.pdfIn PDF document text
    • http://usejus.pro/what_is_sociology_subject_in_artsmqov6.pdfIn PDF document text
    • http://getporte.xyz/what_jobs_can_you_get_with_a_computer_engineering_technology_degree0q8fv.pdfIn PDF document text
    • http://instasavephoto.com/cisco_ea4500_driver_downloadnekvj.pdfIn PDF document text
    • http://vumilopevakidom.iblogger.org/ritotugiwozuvada.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/nefunupu/95629718209.pdfIn PDF document text
    • https://s3.amazonaws.com/levumoduf/43358621879.pdfIn PDF document text
    • http://vonizevugopu.rf.gd/duxemafazusajakajorubala.pdfIn PDF document text
    • https://s3.amazonaws.com/zunaporam/dolfin_swimwear_size_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/dovulavavo/66971107636.pdfIn PDF document text
    • http://lodavudomajip.epizy.com/19622682577.pdfIn PDF document text
    • http://xumugipetoje.epizy.com/lipowiwi.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_off0000f87e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF87E 5364 bytes
SHA-256: 30cda923f34c0d5ac9995accc6af6c7d7325068087ea26d5cbaf9ad3f7850db6
font_01_sfnt_off00010ab8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AB8 10976 bytes
SHA-256: a2e5b346c014fc0f93491da6946ada50d8f083b411fb5f517520ea02e5337f79
font_02_sfnt_off00013042.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13042 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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