Malicious PDF — malware analysis report

Static analysis result for SHA-256 a90c8ffddea360be…

MALICIOUS

PDF

88.5 KB Created: 2021-01-04 16:34:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: b090aa2348370fce0562e4a06391274e SHA-1: 94be4a25e2fb6ec3525b65ca9db68852a97def6b SHA-256: a90c8ffddea360bec3b9076d7a19d3def7e1fbab038fa604b5f12036afa26b00
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URL pointing to a suspicious domain, trafftec.ru. ClamAV and an ML classifier flagged this file as malicious, specifically as a phishing trojan. The document body, though heavily obfuscated, appears to be a lure related to 'Airship ff14 guide', suggesting a social engineering attempt to trick users into visiting the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/aws?utm_term=airship+ff14+guide PDF link annotation
    • https://cdn.sqhk.co/tubafejog/bhj8fgd/dumumifujiwenaniginede.pdfIn PDF document text
    • https://cdn.sqhk.co/gisanewat/iDjgBif/warlings_armageddon_2_hack_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/muwazubivotu/gd6idTW/62287715644.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490757/normal_5faf27d31e6ec.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/tisegovofu/enterobacterias_em_alimentos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fbc76f4a-5d45-4a42-ba7c-5193ec6e0811/electronic_drum_kit_3d_model_free.pdfIn PDF document text
    • https://s3.amazonaws.com/nigimul/bwana_mungu_nashangaa_kabisa_lyrics.pdfIn PDF document text
    • https://s3.amazonaws.com/bidivo/benediktova_cesta.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/39ede878-c519-4309-8c2c-7b4e131b31e9/2739957201.pdfIn PDF document text
    • https://s3.amazonaws.com/vunizi/33623503655.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef71e2c2-f65d-495a-b669-5744b0741fbe/dodge_dart_rallye_2016_specs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/600cc268-3f1e-4cea-b839-077748165b5e/dark_souls_2_ancient_dragon_soul.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_off00011cad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CAD 5188 bytes
SHA-256: 1cd7ce9ef90941722c4caa63b3bf0c68106ecc300d778392185a49fe15d060c6
font_01_sfnt_off00012e5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E5F 11440 bytes
SHA-256: 1f5ddf1ccaf45ba4a9ec85b7bce7c573803ee962aa3b35ad9da2fedf6104b5c5