Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3dd16e622aad1a2…

MALICIOUS

PDF

83.3 KB Created: 2020-12-20 13:13:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 3f5666bd28f5ef560b92b9bac7afaaa7 SHA-1: b2b121d7200e1830f822071939d6bbd22e3a1b5a SHA-256: b3dd16e622aad1a20af36f43fd9bfea657be3e1525bd26d534ac086f09c32bbc
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains a lure for free sheet music, directing the user to a suspicious URL. ClamAV and ML classifiers strongly indicate malicious intent, likely phishing or malware distribution. No scripts were extracted, but the embedded URL is the primary indicator of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://traffine.ru/123?utm_term=crab+rave+sheet+music+piano+free PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4406771/normal_5fde83742463a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369793/normal_5f87e290e7b3e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393624/normal_5fceff541ee75.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403823/normal_5fb93ebd5e5c5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367004/normal_5f94bc10ac542.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365584/normal_5f91d79d2d2a3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368243/normal_5fb34dbd901ee.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366364/normal_5fd268021cf6e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451227/normal_5fa7ad3dc505c.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/pajukovuxetu/vawudikakob.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fdeb3dd109152533654cd3c/t/5fdefdfaf11f517dbbd1afec/1608449531364/warozewuwoxe.pdfIn PDF document text
    • https://s3.amazonaws.com/fexuror/chaos_child_ps4_trophy_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/wiwamoxamo/bartender_classic_wow_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/zuvovoxigumuz/91640231332.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc015e1b-3500-4d17-92a3-d1070ca5ff3a/24054226384.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/78e3dbd0-0bcc-4278-aa80-c0f0a51d82af/97042899450.pdfIn PDF document text
    • https://s3.amazonaws.com/nopomewegobij/akeli_na_bazar_ringtone_free.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f358.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF358 5328 bytes
SHA-256: 3ec5acf4a3a987ef15fe805715631223f2940332886d19124bd3073da962727f
font_01_sfnt_off00010552.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10552 10904 bytes
SHA-256: 97800a9a1f59217f3d7a8489e1960aea8ceb12938ffb48aa1b0dc122d3c1f1ed
font_02_sfnt_off00012ab1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12AB1 16100 bytes
SHA-256: b59afbb2f683942213df284fd86cd9422ada0c5f1ffac7698db8c94a40390bc4

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