Malicious PDF — malware analysis report

Static analysis result for SHA-256 f97d1b4bed8d83e2…

MALICIOUS

PDF

68.2 KB Created: 2021-03-23 01:15:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 6c06db25c602c962ac5691a2b36b7009 SHA-1: ee93070335120f6d4274c252e6e49f84730f6c3c SHA-256: f97d1b4bed8d83e284c8a2bec3a7d47297f1673592a781fe4f5fad5085e71758
126 Risk Score

Malware Insights

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

The PDF file contains multiple embedded URLs, many of which point to disposable hosting services and are likely used for phishing or malware distribution. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using link farms on disposable hosting, suggesting a malicious intent to obscure the final destination. ClamAV detection as 'Pdf.Phishing.Trojan' further supports the malicious classification. While no scripts were explicitly extracted, the presence of numerous external links and the phishing heuristic strongly suggest the document's purpose is to redirect users to malicious 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
  • 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.
  • 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://seumenha.ru/wix?keyword=bill+nye+the+science+guy+populations+video+worksheet PDF link annotation
    • https://cdn.sqhk.co/nasubivapu/jkggrgZ/alan_walker_songs_2020_lyrics.pdfIn PDF document text
    • https://mexobuvuxe.weebly.com/uploads/1/3/4/3/134369937/6f5a2a5cd4.pdfIn PDF document text
    • https://cdn.sqhk.co/numanazolov/ichiyrR/cheesecake_recipe_with_cream_cheese_and_condensed_milk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414677/normal_6010eea353143.pdfIn PDF document text
    • https://cdn.sqhk.co/xusarukave/gdjhiV9/the_culture_code_book_amazon.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4503874/normal_5ff8ab5cc4c19.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481058/normal_603e8affdb837.pdfIn PDF document text
    • https://cdn.sqhk.co/nobipajami/QQjhChj/13101991915.pdfIn PDF document text
    • http://viwuvomax.iblogger.org/adobe_premiere_pro_cc_2017_free_download_with_crack.pdfIn PDF document text
    • https://cdn.sqhk.co/figesuweno/vC2hgjf/65566177224.pdfIn PDF document text
    • https://lelobetiladafan.weebly.com/uploads/1/3/4/4/134497055/2424685.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404528/normal_602addc030d1d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478134/normal_600e646bcc54f.pdfIn PDF document text
    • https://cdn.sqhk.co/tixukiko/thhPRid/fun_facts_about_me_worksheet.pdfIn PDF document text
    • https://kogafisefog.weebly.com/uploads/1/3/1/4/131438876/f7648f51.pdfIn PDF document text
    • https://cdn.sqhk.co/letareximo/c2gfHLX/lesson_teachers_in_lagos.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369158/normal_600c8a2a374d0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zoribele.epizy.com/78775552813.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_off0000cb3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB3C 5700 bytes
SHA-256: e8eff7a4a01c7891e8164f9b0e2b139212a0974dbab20236c307855a3aa7aa47
font_01_sfnt_off0000dec2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEC2 10644 bytes
SHA-256: 2a7fb7b4e91670e05d97123d02e8271fda8089eb6f25acdccdf0d6073866fc5d

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