Malicious PDF — malware analysis report

Static analysis result for SHA-256 d602fec2a498bf80…

MALICIOUS

PDF

74.7 KB Created: 2021-03-11 10:20:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: c308b8a43b99833113d36b4126def7c7 SHA-1: 53b6a4e5c8d2d759c7fab0c5738a19832d7a5db0 SHA-256: d602fec2a498bf80a18bc454abb979ca291f0c8475f1887fe122121a488a0679
184 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs pointing to potentially malicious or disposable hosting, indicating an attempt to redirect users to phishing or malware sites. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' specifically flags a URL leading to known malicious redirector infrastructure. The ML classifier and ClamAV detection further support the malicious nature of this document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://yafferge.ru/award?keyword=crecimiento+y+bienestar+emocional+pdf In PDF document text
    • https://nudadisaxoge.weebly.com/uploads/1/3/4/0/134018155/makirotixozaduv-ganikawa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380211/normal_5ffa085d06706.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377414/normal_6034048f0e0cc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387715/normal_600ba1b9a86ff.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453754/normal_5fee84765e95c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392867/normal_60146b52b9984.pdfIn PDF document text
    • http://kipivejezijab.iblogger.org/zorezapulu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451368/normal_603146d7b3d0e.pdfIn PDF document text
    • https://gisijenoxumo.weebly.com/uploads/1/3/1/4/131437849/73946.pdfIn PDF document text
    • https://wisatevifo.weebly.com/uploads/1/3/0/7/130775851/3bf1d6ef2bc3824.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495402/normal_5fd66c927bcbd.pdfIn PDF document text
    • https://gipimosikiji.weebly.com/uploads/1/3/5/9/135963651/ponoj.pdfIn PDF document text
    • https://gagofabujinu.weebly.com/uploads/1/3/0/7/130739012/nezupodifuzunavogi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484635/normal_6016d49bcd49e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456128/normal_601d82da35aa1.pdfIn PDF document text
    • http://jerazuxu.iblogger.org/soxolelizeragikapezovaba.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/tutasujal/pawefadipowoxuf.pdfIn PDF document text
    • http://rupetakubaso.epizy.com/what_are_the_duties_of_front_office_administrator.pdfIn PDF document text
    • https://s3.amazonaws.com/vikukinumet/xbox_360_kinect_calibration_card.pdfIn PDF document text
    • http://zirivog.rf.gd/14971879337.pdfIn PDF document text
    • http://wujuxupizosafe.rf.gd/game_templates_unity3d.pdfIn PDF document text
    • https://s3.amazonaws.com/forupokisip/ged_practice_test_2020_book.pdfIn PDF document text
    • https://s3.amazonaws.com/pegebunov/skyrim_smithing_guide_light_armor.pdfIn PDF document text
    • http://munomofeduvuwe.rf.gd/making_your_own_wing_chun_dummy.pdfIn PDF document text
    • http://tokegavewori.rf.gd/17901617443.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_off0000e395.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE395 5448 bytes
SHA-256: dd01aa6b9d0918ef266c6539695be185a4d1877cdc4504a0451709080ef29e69
font_01_sfnt_off0000f607.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF607 11556 bytes
SHA-256: abd0687b557e396794af21f3bb32d1ad3792a125e7a1c423fb7cdb3a9a743b60

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