Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b32bc3e1802a1ea…

MALICIOUS

PDF

69.4 KB Created: 2021-03-05 12:29:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 6839b22f44b60f9a4a5abcae7109db15 SHA-1: 69467ada7beceda25b2c21d24603092fb0a041b0 SHA-256: 6b32bc3e1802a1eab3d7b7a09f51e91862411e7836a963d5b0d63e1b341c5627
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one prominent URL pointing to 'fokemale.ru', a domain flagged for malicious activity. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using disposable hosting for link farms, suggesting a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to a malicious site for further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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=keeping+time+readings+in+jazz+history+free PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4475997/normal_5fdd0ed51216a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392667/normal_5ff154413e6ab.pdfIn PDF document text
    • http://useraisins.pro/is_cfa_marketable_in_kenyacs7np.pdfIn PDF document text
    • http://devicesprotectionforusers.site/greatest_common_factor_worksheets_with_answer_keyann6z.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375884/normal_5fcdaf08da03e.pdfIn PDF document text
    • http://zathkatow.xyz/zufuwegodomowasepjq3d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rowodebifofida.rf.gd/enercare_water_heater_maintenance.pdfIn PDF document text
    • http://zudujijikaj.rf.gd/circular_motion_worksheet_multiple_choice.pdfIn PDF document text
    • https://b7e73dfe-ad35-4791-b4f7-7500f5b7882c.filesusr.com/ugd/bc79a4_6bb70f76490c42a88f50cf23db687e2c.pdf?index=trueIn PDF document text
    • http://lebubenopi.rf.gd/exerccios_resolvidos_de_analise_combinatria.pdfIn PDF document text
    • https://acd80754-3b70-42c6-a60f-3489f6261da4.filesusr.com/ugd/f1780b_2f01133888174622a2025c3bc24e39bc.pdf?index=trueIn PDF document text
    • http://fudojozijenabux.epizy.com/sunbeam_bread_maker_pizza_base_recipe.pdfIn PDF document text
    • https://f98f40d2-b649-4e6b-99af-b89bbf2331ff.filesusr.com/ugd/724bd4_e3aa9acc8dfd40b89009544d35259eab.pdf?index=trueIn PDF document text
    • https://29474179-7c7c-44ae-84e0-3c37792f2e25.filesusr.com/ugd/7f817d_f2b27b3216a8411d96ac13d077fa0297.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zafibimutadoti/prepositional_phrase_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/titugome/miller_spectrum_375_cutmate_for_sale.pdfIn PDF document text
    • https://s3.amazonaws.com/sajatofubote/lusijigabi.pdfIn PDF document text
    • https://s3.amazonaws.com/diwitapezu/the_go_giver_by_bob_burg.pdfIn PDF document text
    • https://s3.amazonaws.com/pululusodogi/gejasesonuleboxusebodowa.pdfIn PDF document text
    • https://47c0d0ed-94e3-447f-940a-e265262d053f.filesusr.com/ugd/a43ec6_2701d2d34c0b44298f6cdbdf76734737.pdf?index=trueIn PDF document text
    • https://c504e2ef-f928-4e80-b5b1-fc05046f432e.filesusr.com/ugd/247f25_3c0a5c5b954d4124bef5c3d9c7d4fe2b.pdf?index=trueIn 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_off0000d29b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD29B 5620 bytes
SHA-256: 26f88d71133e758ae1c1549d3dcbb573eeede1ebe71af638eb0fdc5a3568f77a
font_01_sfnt_off0000e5b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5B0 9976 bytes
SHA-256: 7a6b01e8bee68e5ef633c070322be9037ddfcaaab0b74e40b14bb21c776b2da1

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