Malicious PDF — malware analysis report

Static analysis result for SHA-256 d186ea1020d5050d…

MALICIOUS

PDF

69.3 KB Created: 2021-01-17 05:33:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: e74f6ee9e7d707eab495389158efb00c SHA-1: 4695c80c69c45ac94a6bc37ee67b057a51e062e8 SHA-256: d186ea1020d5050d5d46461195048b99a53b47fbc8f3d021c2d251c9ca79be33
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious and likely phishing-related. It contains a large number of external links, suggesting a link farm or redirection mechanism to malicious sites. The embedded content, though heavily obfuscated, indicates the file's purpose is to direct users to external URLs, likely for credential harvesting or further malware delivery.

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
  • 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://trafffe.ru/123?utm_term=business+statistics+in+practice+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4453100/normal_5fa0c35e5e819.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458124/normal_5fdc666ea5523.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368222/normal_5f9d260f3d7ae.pdfIn PDF document text
    • https://luwiritogejoti.weebly.com/uploads/1/3/4/2/134266422/5165429.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487916/normal_5fb43ca488eaa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495531/normal_5fc83b28d07cc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366000/normal_5ff14672cbcd6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460048/normal_5fd8d317e3a6c.pdfIn PDF document text
    • https://site-1180978.mozfiles.com/files/1180978/line_connector_in_word.pdfIn PDF document text
    • https://cdn.sqhk.co/gituridewo/ghsIYRu/nba_all_star_jerseys_for_sale.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000d425.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD425 5164 bytes
SHA-256: 9be87fa0bae8f5046fad6a5bd28639c741a29d1dd3d0304776cdd87e3a7694a6
font_01_sfnt_off0000e5cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5CD 10160 bytes
SHA-256: 9ee1c0bba9a9d66da1d120842dff1c30c4f3bb181cbe20b497e385703408fdef