Malicious PDF — malware analysis report

Static analysis result for SHA-256 6dbcac317f2102b4…

MALICIOUS

PDF

56.9 KB Created: 2020-11-10 07:45:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: be6772ec8de8a76ef5c6ddc9c27bc41c SHA-1: 271a98cbb7907bb82b53f3fadff78ac02ee2ee18 SHA-256: 6dbcac317f2102b4ddddd6941cd1e9803d74bc09474dae3c6a8c9e241d88325f
156 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 0.9996

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 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.
  • 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/aws?keyword=pdf+marijuana+grow+bible PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4366668/normal_5f89d1ecc2a0a.pdfIn PDF document text
    • https://zatajiwivovib.weebly.com/uploads/1/3/4/5/134529671/renukedagemanid_xomolelizogafi_nefotala.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376096/normal_5f997b5534622.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380857/normal_5f9433fca8cb3.pdfIn PDF document text
    • https://ridulajevu.weebly.com/uploads/1/3/4/3/134352946/3618749.pdfIn PDF document text
    • https://kuzaloxamuw.weebly.com/uploads/1/3/1/4/131406684/1481800.pdfIn PDF document text
    • https://mofalapew.weebly.com/uploads/1/3/4/3/134307760/vogapexu_gagifubipenud_tevutisu_zapunina.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418796/normal_5fa4f1c1c804b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/gorajikunobixi/tebaduv.pdfIn PDF document text
    • https://s3.amazonaws.com/zirojopemup/69497109780.pdfIn PDF document text
    • https://s3.amazonaws.com/xipavir/determination_of_bleeding_time.pdfIn PDF document text
    • https://s3.amazonaws.com/xalasawu/animal_kingdom_guide_map.pdfIn PDF document text
    • https://s3.amazonaws.com/fejenijovekozu/12791663234.pdfIn PDF document text
    • https://s3.amazonaws.com/gurowozenupifi/lost_horizon_by_james_hilton.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_off0000a854.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA854 5360 bytes
SHA-256: be0d530f8a7208ffaa010e75ba0c4fb568d6c38b0a10b55f7da04b0e8ad7b37e
font_01_sfnt_off0000ba8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA8B 8432 bytes
SHA-256: bf3f0fc36e64dee77dc26c984a811ae06caccae42f715ea0eb16f58fe2a204bb

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