Malicious PDF — malware analysis report

Static analysis result for SHA-256 90e1ffed7575dc4c…

MALICIOUS

PDF

76.2 KB Created: 2021-02-04 02:40:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: ba26d248da4251341c4eb2f00bb62050 SHA-1: e54b8c7dd7cc86cd9d43c729dacc6d1e588502e4 SHA-256: 90e1ffed7575dc4c7db5d5d0ee4edbdc07db8bbc381d070a0d646f72092783bc
184 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, many of which point to disposable hosting and are part of link farms designed to redirect users. Heuristics indicate these links lead to malicious redirectors and the sample is classified as a phishing trojan by ML and ClamAV. The document body appears to be obfuscated or corrupted, but the presence of URLs and the heuristic firings strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/123?utm_term=hagerty+high+school+florida In PDF document text
    • http://helplnstagramcontact6088757.com/oC49Fuz_atay_korkuyu_beklerken2kq3r.pdfIn PDF document text
    • https://cdn.sqhk.co/nodewanase/ja5gdhu/josorudivafa.pdfIn PDF document text
    • http://naturwow.space/90306570792iut03.pdfIn PDF document text
    • https://xinomufe.weebly.com/uploads/1/3/4/7/134706409/kiton.pdfIn PDF document text
    • https://xugibadibexupov.weebly.com/uploads/1/3/4/6/134684970/xinadefuvalusu.pdfIn PDF document text
    • http://electorat.org/adenoiditis_aguda_y_cronicaq117l.pdfIn PDF document text
    • http://save50.pro/23573340613p1hes.pdfIn PDF document text
    • https://cdn.sqhk.co/vasegodesazu/bibhfbL/77764747708.pdfIn PDF document text
    • http://scrlt.xyz/babbel_idiomas_apk_hackbasf3.pdfIn PDF document text
    • http://musofiron.ru/autodesk_maya_2020_a_comprehensive_guide_downloadvjvw8.pdfIn PDF document text
    • https://cdn.sqhk.co/sejixikerut/WX2udkf/thronebreaker_review_acg.pdfIn PDF document text
    • http://bosnoslovnoejelaniekupit.xyz/nijedo042sj.pdfIn PDF document text
    • http://thailandlove.site/39347806951ksvte.pdfIn PDF document text
    • https://cdn.sqhk.co/zopimoforaja/jggiTbg/most_used_hashtags_on_instagram_for_fashion.pdfIn PDF document text
    • http://tigesonepovar.66ghz.com/54127820655.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/sorogamat/74637087459.pdfIn PDF document text
    • https://s3.amazonaws.com/donarepemi/bangla_video_gane_ing.pdfIn PDF document text
    • http://jafolofip.epizy.com/13946531083.pdfIn PDF document text
    • https://s3.amazonaws.com/satudifin/checklist_format_in_excel_2007.pdfIn PDF document text
    • https://s3.amazonaws.com/sefiwegegagu/30575439205.pdfIn PDF document text
    • https://s3.amazonaws.com/lomuper/order_florida_keys_vacation_guide.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_off0000e9c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9C9 5348 bytes
SHA-256: 2369caba768dc9914256e4795e9eeaf24a6fe8452f8a64f8e84b13c5ba061f1a
font_01_sfnt_off0000fbfc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBFC 11224 bytes
SHA-256: 3c7c711b9ff7058e389a507a900c25f4b290580622d173c54a1e0f431401f703

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