Malicious PDF — malware analysis report

Static analysis result for SHA-256 b69350b10667ad6c…

MALICIOUS

PDF

65.9 KB Created: 2020-12-17 08:01:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: b2402f4724b35a81944e2cf46a10ef1e SHA-1: 923b62a7ef50d02e5879335162ee57ca8e6aea5e SHA-256: b69350b10667ad6c9f3016ce8e41e75b3a4dbd87f0e984e006bae0d7ae2b4fae
214 Risk Score

Malware Insights

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

This PDF file contains numerous embedded links, with one identified as a known malicious redirector. The document body, though heavily obfuscated, suggests a lure related to 'Goldmine vinyl grading'. The presence of multiple external PDF links, including one pointing to a malicious redirector, indicates an attempt to lead the user to potentially harmful content, likely for phishing or malware delivery. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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
  • 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.
  • 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.
  • 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=goldmine+vinyl+grading In PDF document text
    • https://cdn-cms.f-static.net/uploads/4372358/normal_5f9ccd70ac89b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380219/normal_5f9df8e1b5991.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410695/normal_5f9e07a25a328.pdfIn PDF document text
    • https://ruwotepileta.weebly.com/uploads/1/3/4/4/134493455/sadofoxalege.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369158/normal_5f8a0cf5986b2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc59dea6609fd0ee7b1a6c7/t/5fd18e5ab0f0f842d79fc7f2/1607568988389/1405409305.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c8457358-0747-432a-99ab-b328375fd8c4/i_hear_america_singing_poem_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c3adab76-0cd6-4c4a-8572-39fe3753ac9a/starting_output_failed_obs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/51f370e1-f4e8-4e55-b51c-77da58bbd294/folding_table_plans.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f9fee7f-6e4a-4ad9-807e-6dc07879a956/9047515740.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_off0000c60a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC60A 5160 bytes
SHA-256: 50b9c03647b84f2a56abcd7aa4d2956dca3f073ce5540ccb2e54105da0b7cec0
font_01_sfnt_off0000d791.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD791 10480 bytes
SHA-256: 8583eae31d6245cab0f1de611f980b7f262f415b33bf826942f561d2d72d124c

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