Malicious PDF — malware analysis report

Static analysis result for SHA-256 1cb6c39f9bdd1a87…

MALICIOUS

PDF

71.1 KB Created: 2021-01-09 17:14:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 06ab77bc70b8e5452b86e3b907c2a02f SHA-1: 151d3896e2069a9b6a3dc0c09559c0c4e38ba772 SHA-256: 1cb6c39f9bdd1a872e9d0883f00c00c3af1586915fcb0a65af710f7c3426f2cc
96 Risk Score

Malware Insights

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

The PDF document contains an embedded URL that redirects to a suspicious domain, likely as part of a phishing or scam campaign. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan. The document body, though heavily obfuscated, contains text related to purchasing 'formica sheets uk', 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=buy+formica+sheets+uk PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4471096/normal_5fe1b8815a60e.pdfIn PDF document text
    • https://sevafigetof.weebly.com/uploads/1/3/4/9/134902911/eb6576c243.pdfIn PDF document text
    • https://cdn.sqhk.co/gidagolusi/bicihic/makonijepax.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459922/normal_5faad0edd2358.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381294/normal_5fc8b25e5a44d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494417/normal_5fe65afb1dff6.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/5089f163-2c0d-4efe-9934-f682841f3d24/83933620123.pdfIn PDF document text
    • https://s3.amazonaws.com/regufojalojaza/79652287322.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2e98c77-d314-4275-942c-1b6ec97ddd5b/wijokunakipiwekurunak.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b886e460-1ec1-45be-b688-ed29cfbef2ad/jiruwebebekomadote.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed9e9baf-cd89-4499-b576-fe57d74eff67/regression_discontinuity_design_stata.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1573f36e-2435-4ddf-b1ae-192fd24b2835/file_delaware_annual_report.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_off0000ccc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCC7 5080 bytes
SHA-256: 82394b7028a85b52e5dab1c9d0b1285ed3f5ec7f45fd000306e8494a266efbd1
font_01_sfnt_off0000de1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE1A 10444 bytes
SHA-256: d07d5ca1c105647db4c5142971caab58632eb4aead674d10e34fb8a87617f7e8
font_02_sfnt_off00010191.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10191 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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