Malicious PDF — malware analysis report

Static analysis result for SHA-256 152bd2fe9f04d5e8…

MALICIOUS

PDF

110.8 KB Created: 2021-01-03 11:42:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: aec4db5a0b119964db39ce2b51ed9bc1 SHA-1: adfcaed48c1f4930de4c9c08d8c5d5df8a357a7f SHA-256: 152bd2fe9f04d5e8e769c0e4eae38709b6476f1e536dc7d7747744be00669e3a
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link T1059.007 JavaScript

The PDF document contains heuristics indicating social engineering tactics ('ClickFix', 'Security Bypass') and embeds a URL that is likely malicious. The ML classifier and ClamAV detection strongly suggest malicious intent. The document body, though heavily obfuscated, contains text related to 'Creative Cloud' errors, aligning with a lure to trick users into clicking the embedded URL, which is a common phishing or malware distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • Security software disable instruction high SE_SECURITY_BYPASS
    Document instructs the user to disable antivirus or security software — unusual for ordinary documents and high-risk in an unsolicited file
  • 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://traffnew.ru/square?utm_term=creative+cloud++and+install+errors PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4484380/normal_5fcc21d4069a6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376404/normal_5fb8c6506c9c4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387816/normal_5f905432b75b8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383678/normal_5f8fbb6687e1c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366661/normal_5f8c1e9fcc732.pdfIn PDF document text
    • https://cdn.sqhk.co/matelasoguje/jaghwxk/53088278077.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370767/normal_5fc3c8932c54d.pdfIn PDF document text
    • https://cdn.sqhk.co/puwukuwos/eASXkih/tujiwizugu.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/robumuduluwise/ftc_game_manual_2019_2020.pdfIn PDF document text
    • https://s3.amazonaws.com/kegubinefuda/taeyang_eyes_nose_lips_piano_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/betefowubevat/baby_song_free.pdfIn PDF document text
    • https://s3.amazonaws.com/zetubakuz/teaching_time_concepts_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/megulu/zitixirawifezisirixebifan.pdfIn PDF document text
    • https://s3.amazonaws.com/nawuvud/26212010872.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_off0001779d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1779D 4900 bytes
SHA-256: 3cf241efc6ff965796a5439224d16d18b6c9c921b221d0ac41fdd67445e70a6a
font_01_sfnt_off0001884f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1884F 11020 bytes
SHA-256: 589cd45106c749051617f09d6d7b13b6eb1dfa466b2740924fb290b8eccb8ac8

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