Malicious PDF — malware analysis report

Static analysis result for SHA-256 67ba99aa3ccf4d54…

MALICIOUS

PDF

78.7 KB Created: 2020-12-21 20:01:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: c18c47add7646f0ca5553602da5373c2 SHA-1: 240705f71760c76b4af1eb82efc1adf4a3b7ce69 SHA-256: 67ba99aa3ccf4d54efc49005c47a57b3c84cf3078a9e159fe538c5de1b528d04
96 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL that leads to a suspicious domain, likely intended to host a malicious payload or phishing page. The document body, though heavily obfuscated, suggests a lure related to a 'Fizik saddle buying guide'.

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/aws?utm_term=fizik+saddle+buying+guide PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4366022/normal_5f8e84bd04c4e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/e846e6e3-1588-4b29-a537-9976db5f112f/evergreen_public_schools_jobs.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fdd379fff074777c983261b/t/5fdd7a0e7514fb3b76310e9d/1608350223870/tunuxepinenunonidanariwa.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fdea7f851e6b539731cab78/t/5fdf8257a3b92b153c39b07d/1608483415509/paytm_app_uptodown.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/13411083-5aaf-43c3-b4ab-e9bd901e0e88/pawiregidirugu.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc2ce745e8e827d429a49c0/t/5fce08536f0099009e89ff58/1607338067683/wemuniwovidasoluz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9045c21b-4809-455a-a96a-fd4240d1e54a/jofokuwubi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/99a80b0c-b337-47dd-b707-11ec3914fb83/skam_season_1_episode_1_wiki_fandom.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc7a84402915d4a16f9ca82/t/5fcce0ac7ae85b53b2917af3/1607262380818/32940678421.pdfIn PDF document text
    • https://s3.amazonaws.com/levumoduf/ati_comprehensive_predictor_2016_test_bank.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5a12cc6d9645836424050/t/5fd6e4ecab1a676c72a1d3f9/1607918829489/6716082848.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a948554-a4a8-458b-926d-4fe02c941ab2/ez_go_powerwise_charger_manual.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_off0000f879.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF879 5208 bytes
SHA-256: a3c1c40eee8484a94e5bdb1bb0d9c24362cb349ba1c8a96294c5d35c04b27527
font_01_sfnt_off00010a59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A59 10628 bytes
SHA-256: d5653dbc451f4a10192fd9ce813805863c398f058aaf4d76579fd58465427070

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