Malicious PDF — malware analysis report

Static analysis result for SHA-256 20c3d421bd7166d6…

MALICIOUS

PDF

70.7 KB Created: 2021-01-01 08:14:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 8b1ce3542be3eaf23f1865c1246f4871 SHA-1: bb13da3413e245d0bc084cbcbc5df62593c9c301 SHA-256: 20c3d421bd7166d6e7598e3bc1ce1f90154c6910ef7fc4c49aef4bd3170612b1
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URL pointing to 'trafftec.ru', which is likely used for phishing or to download a secondary payload. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the presence of the external URL is a strong indicator of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/strik?utm_term=spiral+perm+rods+for+short+hair PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4527108/normal_5fc1d6f1f3ade.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460446/normal_5fa73d23eaeef.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/c5c6bf93-e40f-431f-b31a-43ce0bc6aa59/77607023156.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ea6e8ec8-edbb-4c1d-bcd7-26a1ff3ced8f/loxewetosuletag.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eee43e0e-934e-420a-ab99-c50250bdf343/first_aid_beauty_tinted_moisturizer_bronze.pdfIn PDF document text
    • https://s3.amazonaws.com/murudute/ufw_firewall_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac4b9769-fce4-4420-8cc0-c51fe6a7aae7/fipifozotu.pdfIn PDF document text
    • https://s3.amazonaws.com/pegebunov/rotopalajolimoli.pdfIn PDF document text
    • https://s3.amazonaws.com/ritoma/genetics_from_genes_to_genomes_5th_edition.pdfIn PDF document text
    • https://s3.amazonaws.com/wogikokuzotaxa/31823260628.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/58a1e326-16a0-446e-b6b2-7b8edc5f73a2/56371335810.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_off0000d96f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD96F 5384 bytes
SHA-256: f73d33637efcc8bc0a30a388fd185ca4a316ab2d5e9567127b21a049ee364d93
font_01_sfnt_off0000eb8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB8E 10208 bytes
SHA-256: d72568c5f20040ea5f9e3163877fb86ccce946238bfad2939e8bcccb6b686f6e