Malicious PDF — malware analysis report

Static analysis result for SHA-256 753a8a698fbba3c5…

MALICIOUS

PDF

66.9 KB Created: 2020-12-27 08:25:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: ee3a29b2f7dbe40f5d72c97515f9e1d1 SHA-1: e237e2671993bfc35aac5f3e732cf124a9812e3b SHA-256: 753a8a698fbba3c5923209f5d535a648652eee43f800a8bf623885bef3ca4dd3
214 Risk Score

Malware Insights

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

This PDF file contains numerous links to external websites, many of which are hosted on suspicious domains and appear to be part of a link farm designed for SEO manipulation. The heuristic firings indicate that the PDF links to known malicious redirector infrastructure and is flagged by an ML classifier as malicious. The document body, though heavily obfuscated, contains references to installation manuals, suggesting a lure to trick users into visiting malicious sites for potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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://cctraff.ru/123?utm_term=honeywell+th8320r1003+installation+manual In PDF document text
    • https://cdn.sqhk.co/momujolo/TMXiap8/money_maker_strain_hunters_seedfinder.pdfIn PDF document text
    • https://cdn.sqhk.co/zivudasexoni/ajajjzp/musicnotes_sheet_music_player_for_windows_10_download.pdfIn PDF document text
    • https://cdn.sqhk.co/futidiwe/jihaBgg/7_wonders_duel_discard_rules.pdfIn PDF document text
    • https://dakikizubebara.weebly.com/uploads/1/3/4/8/134889455/xenolup.pdfIn PDF document text
    • https://cdn.sqhk.co/junizafuzep/R3QeRO0/best_photo_video_maker_free_app.pdfIn PDF document text
    • https://cdn.sqhk.co/fawabanof/TLURkWn/descargar_monstercrafter_hack_apk.pdfIn PDF document text
    • https://jorosovepi.weebly.com/uploads/1/3/4/7/134706332/dc5fe33171ec.pdfIn PDF document text
    • https://cdn.sqhk.co/sirazisiluz/ggrvhbV/next_business_tycoon.pdfIn PDF document text
    • https://cdn.sqhk.co/narulaloro/jyLHihI/hockey_mvp_scott.pdfIn PDF document text
    • https://cdn.sqhk.co/wuluzajiroz/aYjhggt/earn_to_die_1_exodus_y8.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/lovetijif/computers_in_human_behavior_reports.pdfIn PDF document text
    • https://s3.amazonaws.com/ravuxudibure/51959875377.pdfIn PDF document text
    • https://s3.amazonaws.com/jagux/empire_cast_me.pdfIn PDF document text
    • https://s3.amazonaws.com/tanapilamaxi/1342703678.pdfIn PDF document text
    • https://s3.amazonaws.com/rezugekolaba/the_box_jack_ketchum.pdfIn PDF document text
    • https://s3.amazonaws.com/sabegokek/diwan_bed_sheets_online_shopping.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_off0000c89c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC89C 5764 bytes
SHA-256: 9648962f6f3e59850088b70baf39839074195aab7400ff5c4aaf52ca5a9cd4bd
font_01_sfnt_off0000dc26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC26 9588 bytes
SHA-256: 864cabd0df9bcf1a66b22653bf04c3a715d574168e76fa93d82dff59b3018cde

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