Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e96ec50c4beec42…

MALICIOUS

PDF

29.2 KB Created: 2020-05-25 05:56:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9b716fc7fcd0db73eb5d6ec52520751a SHA-1: 8d43ac3c3d22aeb40dcfb27e1228bf6087529e8f SHA-256: 6e96ec50c4beec422f18bf0ae6c70e0d405903f575bbf971c99945843e21bb37
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1105 Ingress Tool Transfer

The PDF contains a large number of external links to other PDF files hosted across numerous domains, as indicated by the PDF_SEO_LINK_FARM heuristic. This suggests a link farm or content distribution scheme. The embedded URL and the document body text point to a lure related to educational material, likely to disguise the malicious intent of directing users to these external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 4

  • 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 http://ry4wn.bpmtc.com/uploads/1/3/0/6/130621535/130621535.html#guia+creativa+3+grado+contestada
    • http://countercurrant.com/uploads/1/3/0/2/130274301/sogezajixo_wuxidivajajowo_buwowaxex_mitotap.pdf
    • http://iammattcruz.com/uploads/1/3/0/9/130969973/mukuju-mofazuka-nakiteruxokos-sonireg.pdf
    • http://zarazwed.com/uploads/1/3/1/6/131636779/xolijaworosoxeta.pdf
    • http://snipitysnip.com/uploads/1/3/0/7/130738805/jedugo.pdf
    • http://transformativearttherapy.org/uploads/1/3/0/7/130739037/gunemoriko.pdf
    • http://francisadu.com/uploads/1/3/0/5/130551013/ec7231e9.pdf
    • http://jaxwax.org/uploads/1/3/0/6/130621906/4977803.pdf
    • http://ezrakebrab.com/uploads/1/3/0/4/130476342/10b97b.pdf
    • http://ezemobility.online/uploads/1/3/1/4/131483002/8590032fb.pdf
    • http://debbiechristie.com/uploads/1/3/0/7/130776445/kibefirikoj_gekuwofeb_poxisiba.pdf
    • http://anjahartley.com/uploads/1/3/0/5/130590507/babokenolapo_buxuli.pdf
    • http://thebodyclinic.services/uploads/1/3/0/4/130435905/bawitojenoteb.pdf
    • http://recoveryrefuge.com/uploads/1/3/0/5/130539354/nimepomiweduvodo.pdf
    • http://fernleaffiberarts.com/uploads/1/3/0/5/130538925/niletumuwizila.pdf
    • http://novific.com/uploads/1/3/1/6/131636774/xeranizifixekere.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004b64.bin
47cffd38139a375d5e278ebcc13dabb9cf704211b031e915c0743bb45fbd1f21		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4B64 8880 bytes

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