Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d6abc7bf0f235a0…

MALICIOUS

PDF

69.0 KB Created: 2020-11-19 01:40:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 6eb24def05229d7c1f9b779b9126f6e3 SHA-1: 9289e993b84e6586328504068553bba3dbb7e434 SHA-256: 9d6abc7bf0f235a08b641ed5440a49353a26f141b3445de269cb67924042c005
214 Risk Score

Malware Insights

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

This PDF file contains numerous links to external websites, including a known malicious redirector. The document body, though heavily obfuscated, suggests a lure related to 'apk download'. The presence of multiple PDF link farms and a critical heuristic firing for malicious redirectors indicates a phishing or scam attempt. No scripts were extracted, but the overall structure and link farm behavior point towards a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://ggtraff.ru/123?utm_term=go+radar+apk+download In PDF document text
    • https://xawuwotogot.weebly.com/uploads/1/3/2/6/132695388/7f06dbb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416500/normal_5f9efc1ac9336.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380681/normal_5f9f3e9e9e138.pdfIn PDF document text
    • https://mufedagejex.weebly.com/uploads/1/3/4/7/134726032/lorubavevotu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422894/normal_5fa09cf734fe6.pdfIn PDF document text
    • https://rikidunojig.weebly.com/uploads/1/3/4/4/134488605/2716430.pdfIn PDF document text
    • https://sakuvida.weebly.com/uploads/1/3/0/7/130775714/muvukafaxiboma.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499999/normal_5fb57b1cf19bc.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/dixaleko/zidemubukido.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d73f4c5-1d63-4be7-9e71-f50d32fd67f1/wowanawonopo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b3030142-bcd8-4c8e-b133-b5b09fb4ddd9/35304798333.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f93548d5-8a00-4eb5-9e6c-9208a2440785/xubate.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_off0000d07e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD07E 4960 bytes
SHA-256: 36ea0c0f10d714788ea9f8fd1c776a0998eeef372c57f6afeca6465971dffc43
font_01_sfnt_off0000e185.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE185 11248 bytes
SHA-256: 674483add0fcceaf7fa78a94b33c607a65d2888146de56ff61d436a58faa6829

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