Malicious PDF — malware analysis report

Static analysis result for SHA-256 83c82cee97d6f93d…

MALICIOUS

PDF

70.2 KB Created: 2020-11-24 19:16:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: aafe0b256ec23f54477ed49a20624443 SHA-1: 23331a77d37985c97e9968f29715953f04661b13 SHA-256: 83c82cee97d6f93d7dc19b5f80617640d80a64891c289dd69d5db32666f6e84f
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file is a PDF document identified as malicious by a machine learning classifier and ClamAV. It contains an embedded URL that directs users to a suspicious domain, likely for phishing or malware distribution. The document body, though partially corrupted, suggests a lure related to 'hard gel nails' to entice clicks on the malicious link.

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://trafffe.ru/123?utm_term=hard+gel+nails PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4368949/normal_5f9b36724b1df.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389394/normal_5fbc12a426244.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464996/normal_5fb9a21d955a6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448539/normal_5fa41847c20fa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369189/normal_5f9498a90575d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386836/normal_5f94e3121b653.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411702/normal_5fa848d9b4719.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368501/normal_5f8d1ba8e0f29.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://uploads.strikinglycdn.com/files/063cc2fb-712b-438a-a082-f7fac2908598/dosijawilozegax.pdfIn PDF document text
    • https://s3.amazonaws.com/zebarufuridorur/drive_by_wire.pdfIn PDF document text
    • https://s3.amazonaws.com/kalanejaxutilif/bbc_learning_english_app_for_pc.pdfIn PDF document text
    • https://s3.amazonaws.com/tipikaxe/tuxen.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

Related samples 1

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cab8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAB8 4552 bytes
SHA-256: e865dda06fe0a830e77cc79a46813baff51091adcf40277b9d1d3ec53549ad62
font_01_sfnt_off0000da1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA1B 10768 bytes
SHA-256: 37aaecf7a048ee5094ea80174c4cebcac0fa3412587f2c2dd00e3ef3a3c654ef
font_02_sfnt_off0000feaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEAA 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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