Malicious PDF — malware analysis report

Static analysis result for SHA-256 b66f7de8b60328bb…

MALICIOUS

PDF

111.2 KB Created: 2021-04-11 04:44:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 2feb616596594a0dadddda7497b2d2de SHA-1: 2314bbf07bcafa00c2eb3bcf6e0ffde8abf61f01 SHA-256: b66f7de8b60328bb78efc8ba739a979be0bb4ae0705f74b924a399ee064d81ec
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://midufefew.ru/strik?utm_term=formato+de+entrevista+no+estructurada+ejemplo PDF link annotation
    • http://borejukeluteva.mygamesonline.org/50964437230.pdfIn PDF document text
    • http://vaxenovutejuzid.sportsontheweb.net/cidco_lottery_result_kharghar_ews.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366385/normal_606a7f7e081ee.pdfIn PDF document text
    • http://sifaritube.sportsontheweb.net/brushing_up_the_years.pdfIn PDF document text
    • http://callup.today/little_red_riding_hood_animeqd0wp.pdfIn PDF document text
    • http://bitunowaluf.sportsontheweb.net/bhartiya_samvidhan_book_download.pdfIn PDF document text
    • https://sukigemanewa.weebly.com/uploads/1/3/2/6/132681928/016fb2932d59b18.pdfIn PDF document text
    • http://folejaf.mypressonline.com/13342879652.pdfIn PDF document text
    • https://vuderuxedus.weebly.com/uploads/1/3/4/6/134692959/mataroripekake.pdfIn PDF document text
    • http://strapslap.online/kigamanogakokubasjl4t6.pdfIn PDF document text
    • http://vopagokiniki.mypressonline.com/transgo_sk_4l60e_shift_kit_instructions.pdfIn PDF document text
    • https://nujawarasut.weebly.com/uploads/1/3/4/3/134310583/gosufipoxemime.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423699/normal_60236ecd23a25.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4461525/normal_5ff5d006b2ae2.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://1cf095b7-1d29-4152-b82c-7733cf7ba0c7.filesusr.com/ugd/c1de29_fac15d947b2b40638ae7f279733d68a3.pdf?index=trueIn PDF document text
    • http://jojulupijawide.onlinewebshop.net/46194159378.pdfIn PDF document text
    • https://9387bd13-3746-4408-b474-2867f26e464d.filesusr.com/ugd/ace02d_8933f09ca8ac48a583d18579eb5ce7ae.pdf?index=trueIn PDF document text
    • http://vidugozu.atwebpages.com/60196263930.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_off000163d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x163D3 5192 bytes
SHA-256: 27c528212c6266bf63a429e08f17ebc077d80afc6e5e00db5245485645483a7a
font_01_sfnt_off00017566.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17566 13476 bytes
SHA-256: bfc6a48c2485e62e9e2bab1b78d8ef31a9f1c35a17becc347accb5546122e05d
font_02_sfnt_off0001a089.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A089 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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