Malicious PDF — malware analysis report

Static analysis result for SHA-256 fce7c81430bcf8d2…

MALICIOUS

PDF

100.1 KB Created: 2021-02-28 22:00:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 7de12804399c0f5c5008187f51aa6571 SHA-1: dd21f9b0b852eba41e5ba686aa8a15901f2ca5f3 SHA-256: fce7c81430bcf8d2c417bb745445ab33c8076b1c4c89265a6d101089070d39a9
126 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, with heuristics indicating it's a link farm on disposable hosting. The embedded URLs, such as 'https://nipisod.ru/strik?utm_term=effects+of+the+second+great+awakening+and+discuss', suggest a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious documents designed to redirect users to harmful sites.

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://nipisod.ru/strik?utm_term=effects+of+the+second+great+awakening+and+discuss PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4498376/normal_5ff8d9dd8a42c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454052/normal_5fd8fee989e12.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450517/normal_5fcd338caf452.pdfIn PDF document text
    • http://wawovotem.22web.org/cartoon_movies_free_in_tamilrockers.pdfIn PDF document text
    • http://fodamibokaf.66ghz.com/43527907998.pdfIn PDF document text
    • https://rofovotojoroko.weebly.com/uploads/1/3/4/8/134878837/nakebuzibabopekajadu.pdfIn PDF document text
    • http://detonic-ordina.website/billie_eilish_my_future_lyrics_youtube30kqr.pdfIn PDF document text
    • http://leaninrzpd.site/hp_laserjet_p4015n_driver_windows_8.1_64_bit92t00.pdfIn PDF document text
    • https://bunixidulot.weebly.com/uploads/1/3/5/9/135964284/1798285.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444643/normal_5ff7828e960e0.pdfIn PDF document text
    • https://gakewejodum.weebly.com/uploads/1/3/4/9/134902465/xepusugofila-jetiz-nugoj.pdfIn PDF document text
    • https://kilavolofijon.weebly.com/uploads/1/3/1/1/131164174/1401746.pdfIn PDF document text
    • http://1pokypki.website/meterpreter_android_hackgpf2e.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://s3.amazonaws.com/lotibabakuj/44050911873.pdfIn PDF document text
    • https://s3.amazonaws.com/sisaxu/coldplay_clocks_piano_sheet_music.pdfIn PDF document text
    • http://gizivafufet.rf.gd/31552414982.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxalowafokuvo/kikotivazepuvaxa.pdfIn PDF document text
    • https://s3.amazonaws.com/jadudusujuje/kuvabalubububutu.pdfIn PDF document text
    • https://s3.amazonaws.com/suzixegazunow/jekawisefufunefelodepota.pdfIn PDF document text
    • http://roxegut.rf.gd/paruratusemava.pdfIn PDF document text
    • https://s3.amazonaws.com/muvojugejoxip/58390140006.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_off00014086.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14086 5244 bytes
SHA-256: a9c0044cc4c9d7a349deecc43fdfcdd6521de75f09d32d67534080861b89c478
font_01_sfnt_off00015262.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15262 10132 bytes
SHA-256: cfa06c5cc7fbb85e22f1a9f0df085e3a57384b62c187bb8759d892d666cb9ebf
font_02_sfnt_off000174e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x174E3 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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