Malicious PDF — malware analysis report

Static analysis result for SHA-256 5cb7b281ab9529a6…

MALICIOUS

PDF

78.1 KB Created: 2020-11-25 09:49:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: d9287ea0ed86bc8a939eab9d9e258a98 SHA-1: 23927b14cd3dd6aa85daa24af5bf5073b58b5b4d SHA-256: 5cb7b281ab9529a6f388d0a18d18b9600a4f2aed727310441ea27f347b17feda
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one pointing to a URL that appears to be part of a phishing or scam campaign. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were extracted, the PDF structure and embedded links suggest it's designed to redirect users to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/strik?utm_term=alice+in+wonderland+monologues PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4365542/normal_5f8801c57f097.pdfIn PDF document text
    • https://rikidunojig.weebly.com/uploads/1/3/4/4/134488605/1313557.pdfIn PDF document text
    • https://xipinirobidojuv.weebly.com/uploads/1/3/4/0/134017625/2925163.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369775/normal_5f87d410672ab.pdfIn PDF document text
    • https://goxemuneb.weebly.com/uploads/1/3/4/7/134715014/36b71296.pdfIn PDF document text
    • https://xavoxoxuda.weebly.com/uploads/1/3/1/3/131379246/medinis.pdfIn PDF document text
    • https://nowusunomotir.weebly.com/uploads/1/3/4/3/134314498/804665.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/vokeri/wexafojevigapanosini.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/58285672299.pdfIn PDF document text
    • https://s3.amazonaws.com/mokixetat/xmtv_player_apk_2020.pdfIn PDF document text
    • https://s3.amazonaws.com/potevip/hollywood_netflix_show.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0be5d1e8-89eb-43b1-adc1-812f8b7cf263/pitifir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4057d9ad-8d3e-4f08-b689-4a4107de1c7f/how_to_build_a_lego_titanic_instruct.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3fb4b9d2-b293-42b5-8339-e82043b24184/tekimomidopiluxepejeledi.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_off0000e021.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE021 5340 bytes
SHA-256: 3e4641d417e1cb86994550a22cdc871b71d36ede29d016508db4fb7835c54690
font_01_sfnt_off0000f245.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF245 10740 bytes
SHA-256: 9aca39d0d6733f7925555b64ee5587244304df99732f80fa0cd2de7a2228e02b
font_02_sfnt_off000116d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116D8 16060 bytes
SHA-256: d1a84ba8f0e4a827a048d387db8dd5dae3538f1c7e72415b16af587a9947cdc7

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