Malicious PDF — malware analysis report

Static analysis result for SHA-256 0649cc1e0d68064b…

MALICIOUS

PDF

70.4 KB Created: 2021-01-02 18:43:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: ea36337a9dd28a83a22d94d579bf69b6 SHA-1: 9a60493a5bdc0aba9f92ea297f91a82849dd43a2 SHA-256: 0649cc1e0d68064be398deba634c4f7ce61f3318e8827e47e395c74016223f0f
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a high risk score. It contains an embedded URL pointing to 'trafficel.ru', which is likely used for phishing or to download a secondary payload. The document body, though heavily obfuscated, suggests a lure related to 'qualitative and quantitative observations worksheet'. No scripts were extracted, but the PDF structure and embedded URI heuristic indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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/123?utm_term=qualitative+and+quantitative+observations+worksheet PDF link annotation
    • https://cdn.sqhk.co/kewexezaviz/Qgh47bv/private_download_apkpure_uptodown.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489263/normal_5fc4a412cc9d3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416299/normal_5f9b99a8d338d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419236/normal_5fd309c9eb94f.pdfIn PDF document text
    • https://cdn.sqhk.co/miviluwulux/hfcPphf/zaxate.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/bevarolimesale/fuvulaferuregotesewil.pdfIn PDF document text
    • https://s3.amazonaws.com/jiwisi/tudomodiwas.pdfIn PDF document text
    • https://s3.amazonaws.com/tixedujegibex/foferonadirimolukinoduno.pdfIn PDF document text
    • https://s3.amazonaws.com/bulalowisu/love_detector_test_unblocked.pdfIn PDF document text
    • https://s3.amazonaws.com/zomuzigo/bright_house_change_of_ownership_form.pdfIn PDF document text
    • https://s3.amazonaws.com/varolexexus/pijawo.pdfIn PDF document text
    • https://s3.amazonaws.com/babuxufarizuxur/diranevezenoxafemi.pdfIn PDF document text
    • https://s3.amazonaws.com/wizitifowubux/57034417850.pdfIn PDF document text
    • https://s3.amazonaws.com/dofufiri/elliptical_galaxy_information.pdfIn PDF document text
    • https://s3.amazonaws.com/kosamupim/free_complaint_form_template_word.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 8

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_off0000cd92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD92 5456 bytes
SHA-256: d03ac0bc064533c9e1b6178ae26ec20129811a1f62039e626f357f46cce70964
font_01_sfnt_off0000e01c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE01C 1800 bytes
SHA-256: 51ebeec29509b87aa858d500e37ac8853184703d07d1f913ce36d8e1dc7764c0
font_02_sfnt_off0000e8aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8AA 10268 bytes
SHA-256: 253bea30beebddd12c9b45b1d0f3cb4de62c6a90d3f4b50c4c3d214bcf0a45d6

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