Malicious PDF — malware analysis report

Static analysis result for SHA-256 1fca6f0588a16697…

MALICIOUS

PDF

76.0 KB Created: 2021-02-23 01:15:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 20b4e6eba873e796f5aa374320d2d144 SHA-1: 7982eda506d635034c779677e44c5b30c2ee1bcd SHA-256: 1fca6f0588a1669775ea33441f8302a3873b502663c3c791a9499f10200e4909
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URL pointing to 'bologen.ru', which is likely part of a phishing or malware distribution scheme. The document body, though partially corrupted, suggests a lure related to 'residual income', a common theme in scams.

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
  • 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://bologen.ru/strik?utm_term=how+to+make+residual+income+2020 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4470024/normal_603408e6ddce8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462056/normal_60125351bf2fc.pdfIn PDF document text
    • https://cdn.sqhk.co/novitovikor/gdDTifI/watch_live_stream_cable_channels.pdfIn PDF document text
    • https://cdn.sqhk.co/mibajufaneja/WN5hfuz/97086733340.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414360/normal_60068da938cf0.pdfIn PDF document text
    • https://cdn.sqhk.co/susojitigi/IRIIjjX/siberian_forest_cat_for_sale_california.pdfIn PDF document text
    • https://cdn.sqhk.co/reriwoduriju/Lia4ghD/soccer_master_multiplayer_soccer_game_download.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454051/normal_5fe51b6f0a4c8.pdfIn PDF document text
    • https://cdn.sqhk.co/rorajakura/KHohfje/66467328324.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465128/normal_5fee2c55bae89.pdfIn PDF document text
    • https://cdn.sqhk.co/budajawisore/hij8hjf/chess_online_olympiad_live.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lujobopuj.epizy.com/free_deck_plan_software_s.pdfIn PDF document text
    • http://gisuvax.epizy.com/jukuwapajewusewiju.pdfIn PDF document text
    • http://sukepavudopuje.epizy.com/adobe_indesign_templates_for_book.pdfIn PDF document text
    • http://judejelalub.rf.gd/excel_vba_cdate_date_format.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_off0000ee4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE4A 5476 bytes
SHA-256: d259693d6e6231e4cedc7796c1ec5835ec359119fadc65c2f7211684858d17ff
font_01_sfnt_off000100de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100DE 10084 bytes
SHA-256: 74a073ffabe07f7c7c3a3bd476c28ae8ca84718aa9e2463c32bfcb4a07683ba8