Malicious PDF — malware analysis report

Static analysis result for SHA-256 df3833334a43d2dc…

MALICIOUS

PDF

68.9 KB Created: 2020-12-04 02:37:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: a086a1f6461756d073b808c861c40ed2 SHA-1: 4b327ed425c058aee48ce87ad78442d38f07d0a0 SHA-256: df3833334a43d2dc61d8568fb47195b6eee280c834c63c881c1075db137bfe76
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 phishing or trojan payload. It contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a malicious site. The document body, though heavily obfuscated, appears to reference search terms, reinforcing the phishing lure.

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://trafficel.ru/aws?utm_term=kingsman+golden+circle+imdb+parents+guide PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4372360/normal_5fc4624cbf8da.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426696/normal_5fa18cc3ce2db.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366050/normal_5fb8a7f72199e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452624/normal_5fa2a862c53d7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368229/normal_5f9c67cd476ec.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464052/normal_5fb644f52ec75.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/firigugixujotov/37895086632.pdfIn PDF document text
    • https://s3.amazonaws.com/gonafoziguwewe/transformer_baignoire_sabot_en_douche.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc14d4c5bcb0228a2853727/t/5fc61039f3de5e49b534f6db/1606815802103/tiluzepimajifoxim.pdfIn PDF document text
    • https://s3.amazonaws.com/ragejufa/soguwuluvajupigosivexozig.pdfIn PDF document text
    • https://s3.amazonaws.com/jidosatikim/vabivumonunage.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc662012cf09257bd90dd25/t/5fc77e13efc65c5b7a451381/1606909460786/how_to_make_bubble_tea_fruit_pearls.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_off0000d180.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD180 5504 bytes
SHA-256: c631b0894f7bfadde1e4f53273572cc55f3d4d8d20c467a8d4629750463cdb57
font_01_sfnt_off0000e41f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE41F 10212 bytes
SHA-256: 424565469f6dcc273f0fc7713a046db18c749801fa100f8a1d33bd6a634cd568