Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7205877959c5c24…

MALICIOUS

PDF

85.1 KB Created: 2021-01-11 12:08:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 1d9bcca8d6d39d1cd291c85a7d62a670 SHA-1: 1d49ea4d4c8d2bb17cbc106d20d92f8a2286dec6 SHA-256: e7205877959c5c24b3302b441cba88d63ea7afe894501661e9bcad437d00e801
214 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, identified as a link farm. One critical heuristic indicates that the PDF links to known malicious redirector infrastructure. The ML classifier also flagged this PDF with high confidence. While no scripts were explicitly extracted, the presence of numerous links and the heuristic firings strongly suggest a malicious intent to redirect users to harmful websites.

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
  • 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://traffking.ru/aws?utm_term=dslreports+speed+test+bufferbloat In PDF document text
    • https://tuzidatawuno.weebly.com/uploads/1/3/4/9/134902979/gutazenubanete.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452193/normal_5fe2f666dca12.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370269/normal_5faba4f7b461d.pdfIn PDF document text
    • https://xisaxori.weebly.com/uploads/1/3/5/3/135324705/xibisojofitot_vorotunanu_kuwagavamaku.pdfIn PDF document text
    • https://ponuwusareti.weebly.com/uploads/1/3/1/6/131636782/3045011.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393751/normal_5f930c70bdeb6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4443824/normal_5ff7bdd4881fe.pdfIn PDF document text
    • https://liforofejot.weebly.com/uploads/1/3/4/3/134350560/zevakenanabaxon.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421780/normal_5f98a6d04f615.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/desenaz/transforming_rectangular_equations_to_polar_form.pdfIn PDF document text
    • https://s3.amazonaws.com/zifilobesumafi/aristteles_filosofia.pdfIn PDF document text
    • https://s3.amazonaws.com/zalisujezajaje/wapezesidakej.pdfIn PDF document text
    • https://s3.amazonaws.com/sinadi/4396485291.pdfIn PDF document text
    • https://s3.amazonaws.com/kizugokofo/certificate_of_compliance_sample_form.pdfIn PDF document text
    • https://s3.amazonaws.com/xezonijida/93006094699.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_off00010edd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EDD 5176 bytes
SHA-256: 2bd70d887e1855dab5beaf0ba4da0847dee683af618efe5c530a5f40eb265f63
font_01_sfnt_off00012082.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12082 11384 bytes
SHA-256: a8a89094642191fb195a784118b9e5eee9249c8baa9d5eda680acd573069eeaf

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