Malicious PDF — malware analysis report

Static analysis result for SHA-256 55065e3c122b4d5a…

MALICIOUS

PDF

68.3 KB Created: 2020-12-26 05:29:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e192cafd3181d30e74bb4a5db7c1b945 SHA-1: 6bf28e76c4b3e27264dbfb8db52e17cbf6363636 SHA-256: 55065e3c122b4d5a38107ab496cbc3db01513735ff1af936601e35efdd6fc308
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, which is disguised with text suggesting a free download of 'Toca kitchen sushi apk'. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing unwanted software. No scripts were extracted, but the presence of a malicious URL is a high-priority indicator.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://traffmen.ru/strik?utm_term=toca+kitchen+sushi+apk+free+download
    • https://cdn-cms.f-static.net/uploads/4368228/normal_5f8762e8d349d.pdf
    • https://cdn.sqhk.co/zupuguvawaj/USCyria/vodafapebetag.pdf
    • https://cdn.sqhk.co/lisesemafo/hfgejdK/29606446997.pdf
    • https://static.s123-cdn-static.com/uploads/4454182/normal_5fde0e829b2e4.pdf
    • https://static.s123-cdn-static.com/uploads/4374956/normal_5fce16b10b0c2.pdf
    • https://cdn-cms.f-static.net/uploads/4366027/normal_5f9572c9b135f.pdf
    • https://cdn-cms.f-static.net/uploads/4391302/normal_5fd8e9496af56.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/nunakixuma/29393756397.pdf
    • https://s3.amazonaws.com/vonusirukete/aankhen_full_movie_old.pdf
    • https://s3.amazonaws.com/levovod/wosapefezogen.pdf
    • https://s3.amazonaws.com/xupizewuxere/20085598535.pdf
    • https://s3.amazonaws.com/bopuxosavubare/whats_up_relative_dating_activity_worksheet_answers.pdf
    • https://uploads.strikinglycdn.com/files/e0b64aee-55ae-4fe7-9a94-b7cbcf7709c0/word_whizzle_cool_answers_wide.pdf
    • https://uploads.strikinglycdn.com/files/793db998-c663-4db1-98fe-c592a247376a/jotowugapotun.pdf
    • https://s3.amazonaws.com/xupovobejanam/gingerbread_man_story_sequencing_worksheet.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d035.bin
9cfeddb885b42f5ad10a3a006819dfd2347c7f99adf679ecbafc0b8bdb95a50e
pdf-font-stream PDF embedded font (sfnt) at offset 0xD035 5348 bytes
font_01_sfnt_off0000e278.bin
f0df3695bb411306d6fecc4e408761b4c90eafbb1ea88f78072fc35239d36e1b
pdf-font-stream PDF embedded font (sfnt) at offset 0xE278 9912 bytes