Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e947c018611c31f…

MALICIOUS

PDF

67.1 KB Created: 2021-01-23 21:54:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: bdf5f596f145e153c0f8db9f60e01916 SHA-1: 135497a162c8215ff93027d775f442917e39e26f SHA-256: 8e947c018611c31fe8f6f107671e796c17d93b730b070766d8e7e32996dea5bb
126 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 high likelihood of malicious intent. It contains numerous embedded URLs, many pointing to disposable hosting, suggesting a link farm or phishing operation. The presence of external URIs and the 'link farm' heuristic strongly suggest the document's primary purpose is to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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/123?utm_term=capstone+student+activities+economics+answers PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4448720/normal_5fe2cc0386c9a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369796/normal_5fe468ac59cde.pdfIn PDF document text
    • https://site-1172428.mozfiles.com/files/1172428/free_printable_cute_to_do_list_template.pdfIn PDF document text
    • https://site-1184900.mozfiles.com/files/1184900/53207318551.pdfIn PDF document text
    • https://site-1247083.mozfiles.com/files/1247083/zirapezamekuboji.pdfIn PDF document text
    • https://site-1250930.mozfiles.com/files/1250930/50511540866.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453528/normal_600c12ce34eaf.pdfIn PDF document text
    • http://wokizunapajunez.iblogger.org/18517480640.pdfIn PDF document text
    • https://site-1174676.mozfiles.com/files/1174676/hyponatremia_correction_guidelines.pdfIn PDF document text
    • https://cdn.sqhk.co/madilaxetevo/he3dhbJ/59883123558.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401518/normal_5fd133fd31885.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tawexega.epizy.com/gekojasibidonozox.pdfIn PDF document text
    • http://budakokubogomax.rf.gd/what_is_the_unforgivable_sin_catholic_answers.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_off0000c9d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9D1 5244 bytes
SHA-256: e16aa67f5bb162462ce4a0a91fa54a57435a4c8370c59dbc282860ee2bac765c
font_01_sfnt_off0000dba0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBA0 10512 bytes
SHA-256: c37aecad0b52d5ffe968d867197a14587fad43315275761ed929c3b307014256

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