Malicious PDF — malware analysis report

Static analysis result for SHA-256 2825c2f4ff84ae80…

MALICIOUS

PDF

78.8 KB Created: 2021-04-04 00:00:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: e120841bf0c99fe493ae4f37eb815801 SHA-1: ca474e73dc849d2da62fd943f432f5a374c9f240 SHA-256: 2825c2f4ff84ae80482124a551af3340079ef89c4f284d7218e35a880b801368
194 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious content. The embedded URLs, such as https://mezovuduw.ru/aws?utm_term=is+old+navy+fulfilling+online+orders, are likely part of this redirection scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://mezovuduw.ru/aws?utm_term=is+old+navy+fulfilling+online+orders PDF link annotation
    • http://narosisebono.22web.org/firisizegexavabijusoli.pdfIn PDF document text
    • http://bagajuz.iblogger.org/sony_crackle_apk_2019.pdfIn PDF document text
    • https://rozutawupev.weebly.com/uploads/1/3/2/6/132695629/1748385.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380068/normal_5fde7633d428d.pdfIn PDF document text
    • http://mulotaras.iblogger.org/19828838956.pdfIn PDF document text
    • https://gurekageta.weebly.com/uploads/1/3/2/6/132695257/1572537.pdfIn PDF document text
    • https://bagerinev.weebly.com/uploads/1/3/1/6/131636948/suzazekubevem.pdfIn PDF document text
    • http://siwarezowagi.iblogger.org/imphal_west_weather_report.pdfIn PDF document text
    • http://wepijafiguwenan.mywebcommunity.org/6413557939.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485010/normal_6003a4f3827b3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373264/normal_5ff19821601cd.pdfIn PDF document text
    • https://kasikijafeke.weebly.com/uploads/1/3/1/4/131406722/b59c69e32c1b0.pdfIn PDF document text
    • https://tebuwopelovenep.weebly.com/uploads/1/3/1/4/131453198/7763620.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://2ac8321c-28d8-41c8-ac7a-99137a6fe030.filesusr.com/ugd/157ee0_00e06fe9dc4341c7a65d6c625706bf38.pdf?index=trueIn PDF document text
    • https://1bc2da55-d9f9-46f5-9d67-b48dc82c85d4.filesusr.com/ugd/957ce7_49946cf02de94ffebbdc90e83ddc26f5.pdf?index=trueIn PDF document text
    • http://duxegejuw.atwebpages.com/high_level_capacity_planning.pdfIn PDF document text
    • http://wuluzakasuw.epizy.com/scholarship_essay_outline.pdfIn PDF document text
    • http://vatasinunevuto.epizy.com/noroxar.pdfIn PDF document text
    • https://dce579ed-4708-43c3-aaeb-2c76a6268d78.filesusr.com/ugd/944939_f82dd1e0f5f5481287e8f450e3702692.pdf?index=trueIn PDF document text
    • https://ab737b70-891a-4a1f-8db9-ee548211cb31.filesusr.com/ugd/ce14f3_0cbc7a6c30ea4181b46ddda523050e31.pdf?index=trueIn PDF document text
    • https://76bf09fe-c378-4d6f-baa9-beaf48595a8b.filesusr.com/ugd/61567a_fef20f0e470f468896ee444956174d35.pdf?index=trueIn PDF document text
    • http://kesajebofiruzu.epizy.com/application_of_biotechnology_in_food_industry.pdfIn PDF document text
    • http://sujimivotabis.rf.gd/what_are_the_five_rhetorical_strategies_used_to_extend_a_definition.pdfIn PDF document text
    • http://tetaxejil.rf.gd/dd_character_sheet_3.5_app.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_off0000f5b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5B6 5172 bytes
SHA-256: 9a9d6d597377712e7e8651d6a6491a4dbaf7f1dfe5d119db96406650a37169ef
font_01_sfnt_off0001076e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1076E 11280 bytes
SHA-256: ca575747ac0c4bb0e9708152f57ab5c4e4651172ab16434ee20335c80995c9d1

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