Malicious PDF — malware analysis report

Static analysis result for SHA-256 e65ea0b2d558b8aa…

MALICIOUS

PDF

73.9 KB Created: 2021-05-11 17:09:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: cd9c83ae8ece3ee4abd6e78e89f71943 SHA-1: 527fdb42bd9e9c988dc7c61813668e7e19e9053b SHA-256: e65ea0b2d558b8aaff1f352cbb720a137ce0934fae6e34b2d51f15b2b8f008be
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 0.9998

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://jacksth.ru/strik?utm_term=sig+sauer+p238+holster PDF link annotation
    • https://kuritemu.weebly.com/uploads/1/3/1/3/131383398/saxasevulaxu.pdfIn PDF document text
    • https://lebabipiw.weebly.com/uploads/1/3/0/9/130968925/towiwivef.pdfIn PDF document text
    • https://welaxulisura.weebly.com/uploads/1/3/4/0/134042468/7831183.pdfIn PDF document text
    • https://daluwora.weebly.com/uploads/1/3/4/3/134319963/5cbce2.pdfIn PDF document text
    • https://roriwemako.weebly.com/uploads/1/3/4/5/134599113/wopukozusota.pdfIn PDF document text
    • http://pililiriniru.mypressonline.com/descargar_biblia_de_estudio_reina_valera_1960.pdfIn PDF document text
    • https://cdn.sqhk.co/bidogefapo/ihhifhb/torukesonodo.pdfIn PDF document text
    • https://rajizoru.weebly.com/uploads/1/3/1/8/131856770/vifadosufuwazavexagu.pdfIn PDF document text
    • http://wijutomotagam.mypressonline.com/stored_procedure_in_sql_server_2020_with_example.pdfIn PDF document text
    • https://dewanuraxode.weebly.com/uploads/1/3/4/3/134324700/desabojiwatixup-pubelaresa.pdfIn PDF document text
    • https://wufowidujexo.weebly.com/uploads/1/3/5/2/135293423/ridesajixulopedigen.pdfIn PDF document text
    • https://limowidijepa.weebly.com/uploads/1/3/5/9/135992559/66569.pdfIn PDF document text
    • https://cdn.sqhk.co/gufemazibafi/ho4thjD/marvel_runaways_topher_powers.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/71169a29-a8cc-4612-a844-49e1d911aa83/69597940643.pdfIn PDF document text
    • https://ff5d1526-1eb9-447d-8915-67ca9933f1b4.filesusr.com/ugd/9565fd_ec37f5aa8195482d9d5026e78145a10d.pdf?index=trueIn PDF document text
    • http://gozenabuzixi.onlinewebshop.net/bl3_childhoods_end_find_a_satellite.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/523ac5da-a6b2-4e2d-91be-534f097824d4/how_to_put_sim_card_in_alcatel_one_touch_flip_phone.pdfIn PDF document text
    • https://3f46bf15-0a8c-4e80-b3e5-a2e3bf90e008.filesusr.com/ugd/8e6e76_d1d13a9f9613484da962f3dcd332db7a.pdf?index=trueIn PDF document text
    • https://5ac9d038-517d-4536-97f6-676423289421.filesusr.com/ugd/b444d4_1b0f75465efc47d485a6aa918b7a40df.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_off0000e137.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE137 5676 bytes
SHA-256: 64d370d2bec6c40cb0461d702fbf29b200d0143997d6977601ff0b643dd93beb
font_01_sfnt_off0000f47a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF47A 11296 bytes
SHA-256: c9f067c4b5ed6b0fdca33d073f9c6560fb9cd57795559a7548f943ad1892de75

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