Malicious PDF — malware analysis report

Static analysis result for SHA-256 9cc64ef4cd68ae54…

MALICIOUS

PDF

71.9 KB Created: 2021-03-20 15:08:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 59a70a3d18f6a8a2f5d5d8d05d491570 SHA-1: e957be0a930404aba3cabd3a4039f8b45b2bc97a SHA-256: 9cc64ef4cd68ae54588c53bdc24adc5c3e1c67ac7f5d4f7fa1542613d2477c36
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://jumiwimov.ru/wix?keyword=apk+shark+simulator PDF link annotation
    • https://zesaxigupube.weebly.com/uploads/1/3/4/0/134016892/2518346.pdfIn PDF document text
    • https://fenizivafuno.weebly.com/uploads/1/3/1/3/131380836/3360726.pdfIn PDF document text
    • http://witikotuxigere.scienceontheweb.net/accordi_canzoni_napoletane.pdfIn PDF document text
    • https://rukusipaxup.weebly.com/uploads/1/3/2/6/132683367/wivulujumuno.pdfIn PDF document text
    • https://vitebikune.weebly.com/uploads/1/3/4/8/134895950/7820386.pdfIn PDF document text
    • https://cdn.sqhk.co/joxonorapa/W9ljbe8/dakopaxadikobi.pdfIn PDF document text
    • http://wivuperafuzo.mypressonline.com/kutokefonemanifukobija.pdfIn PDF document text
    • http://motarojetox.sportsontheweb.net/torujumodujudawi.pdfIn PDF document text
    • https://luwimaxilonava.weebly.com/uploads/1/3/4/7/134772317/xegepopapixo_nojolukej_joligibow_ribevid.pdfIn PDF document text
    • https://cdn.sqhk.co/pazakazagoz/hgihfQ4/71106672803.pdfIn PDF document text
    • http://miromawetibikew.mywebcommunity.org/administracion_publica_ecuador.pdfIn PDF document text
    • http://xenifizonuk.22web.org/zofabot.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://8e0cabef-d481-4215-b437-8a5fc4e4723c.filesusr.com/ugd/f41140_734606092301488f8746ba55f4d2852c.pdf?index=trueIn PDF document text
    • https://87da31d5-d184-45e7-a456-0ad082c8bd65.filesusr.com/ugd/55e94a_7344a4a124f044e9bee8237d117ca198.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/13ac6241-eb74-4744-949d-6cf17bfa532d/the_last_song_full_movie_free_123movies.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f51c10cc-a7df-40b8-ad57-01f97a406ec9/evangelium_vitae_summary_powerpoint_1.pdfIn PDF document text
    • http://jabejanaboz.atwebpages.com/high_seas_maritime_law.pdfIn PDF document text
    • http://gurunetotej.rf.gd/kitab_al_arabiyah_linnasyiin_jilid_3.pdfIn PDF document text
    • https://748f1d53-d141-46c1-926a-d14fc69713a3.filesusr.com/ugd/e3ed1f_e0d0030bb8f740b88c9c68e729b56c8c.pdf?index=trueIn PDF document text
    • http://suwetiwojiza.rf.gd/blue_cross_blue_shield_florida_provider_forms.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_off0000db9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB9C 5112 bytes
SHA-256: ab37805534b893dedc5be1d8368dfa62ac3f4ac265947f4b858af0b841143c17
font_01_sfnt_off0000ecd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECD5 10976 bytes
SHA-256: 3dab7c1cc2b44bc2320b09fc7666bba4c0c91f8ed63bef9cb417240b5cf2d4f3

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