Malicious PDF — malware analysis report

Static analysis result for SHA-256 70a4dbeeb3f57acf…

MALICIOUS

PDF

79.8 KB Created: 2021-03-30 23:29:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: fc1a40f73a2c4abde252fcc5386c8bd3 SHA-1: f3aef899c597e7aa927241e78ce0374a66d54a65 SHA-256: 70a4dbeeb3f57acfb2a7a35c9d05e562f6fdc08921f1d0e1c9ce4c129e9a617d
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded URLs, with a primary focus on 'fokemale.ru/strik', suggesting a phishing or malware distribution attempt. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a deliberate attempt to create a link farm on disposable hosting, further supporting malicious intent. The ML classifier and ClamAV detection strongly indicate malicious content, likely a phishing lure or a downloader.

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
  • 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://fokemale.ru/strik?utm_term=scag+patriot+reviews+2020 PDF link annotation
    • https://cdn.sqhk.co/jirudumom/gehij5O/turofer.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457862/normal_60314c36a7974.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388293/normal_60548f0b9b19e.pdfIn PDF document text
    • http://blog-millionaire.buzz/972068991912ahkg.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4491155/normal_5fe44b9ff303b.pdfIn PDF document text
    • https://cdn.sqhk.co/lojiwoxaz/ijmgigh/12291549218.pdfIn PDF document text
    • https://cdn.sqhk.co/boxokozofe/ibggqhf/catfish_baitcast_rod_and_reel_combo.pdfIn PDF document text
    • https://cdn.sqhk.co/nakijalufiw/ZhiUTgd/67951968671.pdfIn PDF document text
    • http://vadonodip.22web.org/83574791148.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450160/normal_5fedbe72681f6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489598/normal_601dd57537c02.pdfIn PDF document text
    • http://cardioactiveufficiale.site/why_do_i_feel_physical_pain_when_i_see_someone_get_hurtlo076.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://a98f38e8-5810-4fc9-be6a-c3d78c7c4f9f.filesusr.com/ugd/921909_71f3dd4512e44b8caf733f1942dd3d34.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/luborinizu/28021675163.pdfIn PDF document text
    • http://nogomazarem.epizy.com/venugovozatuvagovunetod.pdfIn PDF document text
    • https://caa91486-5fcc-43b7-8b2b-5b817ae85bbe.filesusr.com/ugd/26bbcf_42958bde86964909aa811e47387447a7.pdf?index=trueIn PDF document text
    • http://varuxaze.epizy.com/falapef.pdfIn PDF document text
    • https://s3.amazonaws.com/mefonevimimix/family_medicine_journal_case_report.pdfIn PDF document text
    • http://buxibokoz.epizy.com/oxford_english_to_bangla_dictionary_download.pdfIn PDF document text
    • http://dopodisimedu.epizy.com/career_word_search_puzzle_answer_key.pdfIn PDF document text
    • https://6f465708-eb37-4ee2-8658-ebeec6cd93ea.filesusr.com/ugd/4bb103_ed9b225e377d451d8255924a79d6d886.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/regufojalojaza/22132217956.pdfIn PDF document text
    • https://s3.amazonaws.com/joterige/97449522769.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA37 5280 bytes
SHA-256: 08b343747280a5457211a8051806e022a0316c278ecbd293477fb50c3454579e
font_01_sfnt_off0000fc4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC4A 11160 bytes
SHA-256: b96b4ee1e6008d532202cc75449dea3d46f1bd35e5b987ff4d0672bca8646ea9
font_02_sfnt_off0001226b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1226B 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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