Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0a8bb39bb293133…

MALICIOUS

PDF

113.1 KB Created: 2021-02-24 01:49:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 5e94006dfa9d55796ddb144dc35b738a SHA-1: 190845def000419058a19e5e4c565fb684402a93 SHA-256: e0a8bb39bb293133c3b14b86d76b194dfb86ce9abe402e861d251660f95e5d23
154 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical alert for linking to known malicious redirector infrastructure. The ML classifier and ClamAV also identified it as malicious. The embedded URL, https://crophysi.ru/123?utm_term=edipo+rey+personajes+principales+y+secundarios+caracteristicas, is the primary indicator of malicious intent, likely serving as a lure for phishing or malware delivery. No scripts were extracted, but the PDF structure itself facilitates the redirection.

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://crophysi.ru/123?utm_term=edipo+rey+personajes+principales+y+secundarios+caracteristicas In PDF document text
    • http://gooddevice-online.com/what_is_canadian_national_sportdsl3z.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418991/normal_6002b337a12b3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465151/normal_602bace7b7149.pdfIn PDF document text
    • https://cdn.sqhk.co/rewazexi/bPidida/jet_boat_racing_calendar_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/rojozedofaf/Vjeibgj/hertz_mci_airport_address.pdfIn PDF document text
    • https://cdn.sqhk.co/kaxejelun/L2hfCHi/bubble_shooter_hack_version_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/figakeves/jjijjjT/girl_bands_of_the_late_90s_early_2000s.pdfIn PDF document text
    • https://cdn.sqhk.co/jalosemuv/4Z8gA7F/8569731515.pdfIn PDF document text
    • https://cdn.sqhk.co/luzigagoguna/eigjhji/join_forex_trading_for_free.pdfIn PDF document text
    • https://cdn.sqhk.co/birenejar/Pwghcgc/beats_headphones_not_pairing_with_iphone.pdfIn PDF document text
    • https://cdn.sqhk.co/xopigotax/gjDHdPr/40642658571.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4472773/normal_5fc7a2338e378.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jokizexolej.epizy.com/57035289058.pdfIn PDF document text
    • https://s3.amazonaws.com/vitelitubovuluj/jilurinifi.pdfIn PDF document text
    • https://s3.amazonaws.com/rewepalazamiso/beach_buggy_racing_game_for_pc.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_off000179d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x179D0 5200 bytes
SHA-256: 4d2a440ef260e65ffaf2dfc6d35cd8e361b02fca4de6e993d24fb4ffb9286689
font_01_sfnt_off00018ba3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18BA3 13576 bytes
SHA-256: 76469c6fba4c51541f6a1ada7b2a6f1b52af34b3c3869dec99efcad5fac2e586

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