Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e8877ef205bb566…

MALICIOUS

PDF

87.8 KB Created: 2020-11-26 12:46:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 4128ea3a20f6466c0dba1bd3fbc735a1 SHA-1: ddbd751a2ae555b4df376fc7530cb6b74cf16357 SHA-256: 5e8877ef205bb566ad9cd7c1605ca1a05d35bb156bcc62e49e0f53dadf1dd811
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://trafffe.ru/strik?utm_term=crude+vanillin+melting+point PDF link annotation
    • https://lajojixuvoporor.weebly.com/uploads/1/3/0/7/130738555/fcee3f.pdfIn PDF document text
    • https://juporolo.weebly.com/uploads/1/3/1/3/131380745/talivosevun.pdfIn PDF document text
    • https://nizesuvijeva.weebly.com/uploads/1/3/1/6/131607023/285ebb4d75d4bf.pdfIn PDF document text
    • https://totixibepetuter.weebly.com/uploads/1/3/4/3/134345693/kexudikof.pdfIn PDF document text
    • https://womufotijomagew.weebly.com/uploads/1/3/4/3/134351515/xorasad_dagojurebojiw.pdfIn PDF document text
    • https://norumevi.weebly.com/uploads/1/3/0/9/130969469/750b15ca726bb.pdfIn PDF document text
    • https://zabuweror.weebly.com/uploads/1/3/4/4/134498188/fegujuxonufugis_pumoraxav.pdfIn PDF document text
    • https://xobisajak.weebly.com/uploads/1/3/4/2/134234638/7963b.pdfIn PDF document text
    • https://lejiwukepefi.weebly.com/uploads/1/3/4/4/134467113/48f4b372f.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/3af495ff-d2cb-4b44-890d-38f8b73e4fe8/user_manual_canon_p100-dh_ii.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b8d54d8c-3961-4aa7-a55f-7afebf94c7d0/46845376.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c96645f0-ebd2-4874-b288-9636b84edc14/80105332666.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b055696-3c23-4237-9d40-0c467a276f88/tapezinupa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fed61238-b2ec-4183-ba21-22e0ff351db6/totonironaba.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb84c006-4a33-4dd3-af7d-9f4506744d04/80645899146.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e111d2d6-f795-46a6-af9b-03b9b4c5440c/kixufuvemixesizededekuzi.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn 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_off0001076d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1076D 6492 bytes
SHA-256: 0acae127d432746d095b5bd0375a0897f34f14d5dd3edc903598d39ab18e2e5d
font_01_sfnt_off000117a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117A1 5064 bytes
SHA-256: 900331cc879edd7ad4aa0a049bc4195f55cb9cec66feec3e5045b0049e34a088
font_02_sfnt_off000128c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128C5 12224 bytes
SHA-256: 454ac66e08e60174214980899385f077ab3844851b288bf5492215bb590658c6

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