Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec47ecb7ae99110d…

MALICIOUS

PDF

106.3 KB Created: 2020-11-24 17:49:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 4c77e7413c990d2611b059eb519b9429 SHA-1: b6729efd75a1fc9908d325d84ffef43fd64107b0 SHA-256: ec47ecb7ae99110dae14f7addfcb44957e4b4c77441c8abb0c963c606b12ea46
164 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a common tactic for link farms or phishing sites, as indicated by the 'PDF_SEO_LINK_FARM' heuristic. The ML classifier and ClamAV detection strongly suggest malicious intent, specifically identified as 'Pdf.Phishing.Trojan'. The embedded URL 'https://trafftec.ru/aws?utm_term=netflix+app+for+android+4.+0.+4' further supports a phishing lure related to a Netflix app download.

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://trafftec.ru/aws?utm_term=netflix+app+for+android+4.+0.+4 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4366337/normal_5f93a44f41ff6.pdfIn PDF document text
    • https://keniwuki.weebly.com/uploads/1/3/1/4/131483234/32e063a95e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371248/normal_5fadf493a0f61.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365653/normal_5fbc890422f0b.pdfIn PDF document text
    • https://firupewuvub.weebly.com/uploads/1/3/4/3/134330425/batajimikog_regixewazeses_wanuruzejiduxam.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402740/normal_5f94a57758837.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488855/normal_5faec23edf2ad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411218/normal_5fade09fdb9ad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404107/normal_5f9746821a353.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372702/normal_5f9cda01d4b2f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370097/normal_5fb4c09152e33.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387230/normal_5f9f2f1cccd06.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/pibabopuduj/flats_east_bank_construction.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f06f1b5-64fc-4801-a338-a120a183d695/wulijutarupu.pdfIn PDF document text
    • https://s3.amazonaws.com/libosokune/irregularity_report_psat.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00015775.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15775 4944 bytes
SHA-256: 315c77e179df9c8232e310cc618017bfb77281cfe82fce0d8d4133a34aa2b7cb
font_01_sfnt_off00016859.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16859 11192 bytes
SHA-256: 83a61747390c073f38d3a144291c035c503729b40278ca1a4363165315e6927f
font_02_sfnt_off00018df9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18DF9 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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