Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6b3577142208a22…

MALICIOUS

PDF

72.1 KB Created: 2021-02-21 06:30:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 462c76c0912ca09528a478aabfa4f3a4 SHA-1: c6e818b7bbc46a2b26417d4cd945e0574c24b33f SHA-256: a6b3577142208a222d36e1fa89ca2aefb7d04f9b8a74c30405361e7f5feba2a2
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or malicious intent. The PDF contains a large number of external links, many of which point to other PDFs, suggesting a link farm or SEO manipulation tactic. One prominent URL, https://seumenha.ru/wix?keyword=exploding+kittens+apk+revdl, appears to be a lure. No scripts were extracted, but the PDF structure itself facilitates the distribution of malicious links.

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://seumenha.ru/wix?keyword=exploding+kittens+apk+revdl PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4407070/normal_5fd3b4716aa16.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494648/normal_5fe83ae70cb93.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366015/normal_5fe028d92d9de.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447649/normal_5fef1a1c2f31c.pdfIn PDF document text
    • https://xufujume.weebly.com/uploads/1/3/4/8/134851049/tijudoxibuvegokof.pdfIn PDF document text
    • https://cdn.sqhk.co/kegufamop/IFShjji/business_startup_grants_for_single_mothers.pdfIn PDF document text
    • https://cdn.sqhk.co/lazogapuvo/ibhbYyc/97473528508.pdfIn PDF document text
    • https://xexidizufom.weebly.com/uploads/1/3/4/5/134508107/jasinonifutiz.pdfIn PDF document text
    • https://gogadumipoti.weebly.com/uploads/1/3/1/0/131070618/valipedoxupovoxetubu.pdfIn PDF document text
    • https://digafixi.weebly.com/uploads/1/3/0/7/130776371/xuxagutelawor.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4461761/normal_5fdfc1525c796.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415045/normal_5fdd0d62c26ee.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496602/normal_5feb983368377.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/bepukuba/algebra_questions_for_grade_6.pdfIn PDF document text
    • https://s3.amazonaws.com/farefasejikap/ansys_workbench_15_tutorial.pdfIn PDF document text
    • https://s3.amazonaws.com/tawosutosuxi/31709709858.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cd00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD00 5064 bytes
SHA-256: d8f742f12692fabe414867ffa237c15160615066707a1fa4c745bdaa54cf904f
font_01_sfnt_off0000de51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE51 12780 bytes
SHA-256: 9791d1e803b3bdc2e5f07bf06b497565cda63062a7ece072b3424d7c15ec415b
font_02_sfnt_off00010558.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10558 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

Open this report in the interactive analyzer, or submit your own file for analysis.