Malicious PDF — malware analysis report

Static analysis result for SHA-256 903af2944e5639d4…

MALICIOUS

PDF

66.6 KB Created: 2020-12-17 07:13:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: a11bfa715482724493d9066a276ddbe8 SHA-1: 0875305ee9f478da9761280b1315e81a8092b9f4 SHA-256: 903af2944e5639d43e809525461f02bb22652a6e405b0370b50b98899237959d
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, disguised with a search query for 'deep purple black night piano sheet music'. This suggests a phishing or social engineering attack aiming to redirect the user to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for delivering a secondary payload or conducting further phishing.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://cctraff.ru/wb?keyword=deep%20purple%20black%20night%20piano%20sheet%20music In PDF document text
    • https://zegaxazidunuxe.weebly.com/uploads/1/3/4/7/134746987/abbf77fb3a9.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/leguvefu/betalactamicos_veterinaria.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cfd0ab45-86cd-4118-a589-1939122281a2/93557036126.pdfIn PDF document text
    • https://s3.amazonaws.com/gafedupeba/39675677591.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/92ef2da7-4146-4b4d-9c3f-3655e9455a42/lamujuwamomaxakesi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ece5296-8615-4f36-be96-0fa7c3aa4e87/buzimet.pdfIn PDF document text
    • https://s3.amazonaws.com/degerutisig/85358439107.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a3c296c-2ba9-46e7-894c-639a617ee7c2/motazexofomev.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f1966d29-da3d-4ee2-bdd4-31f2def567a0/vevagozedunafezike.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/294d6f68-7273-4ad5-aa37-49809dbeb399/the_good_witch_gift_full_movie.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/77bb67bb-6335-4835-99bf-ad0f82ff4e17/96824923172.pdfIn PDF document text
    • https://s3.amazonaws.com/muwemivumazulax/wilukibe.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_off0000c741.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC741 5548 bytes
SHA-256: 3771974b0de2c8ea4eaa8ee7fb29db8b12d068256cb106e047e6da9bd8864a8b
font_01_sfnt_off0000d9f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9F5 10500 bytes
SHA-256: e253b4ca9a6c27196d614ea0ac647154034109d5c26a54dedcbf3629ea32874d

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