Malicious PDF — malware analysis report

Static analysis result for SHA-256 9edc227117599fc4…

MALICIOUS

PDF

71.9 KB Created: 2021-01-13 21:52:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 05a67d3abbb9842da17e2ca3882a8a67 SHA-1: 765232211b2755f30b822f5c3928880f3fe9b179 SHA-256: 9edc227117599fc437c0fb9432ecd1138fc81c0943a3f0cd89de949b1262f608
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 high likelihood of malicious intent. The heuristic firings reveal it contains a mass external PDF link farm, with numerous URLs pointing to external sites, suggesting a phishing or content redirection scheme. The presence of embedded URLs further supports this, indicating the document's primary function is to direct users to potentially harmful external resources.

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://traffset.ru/123?utm_term=okaloosa+tax+collector+shalimar PDF link annotation
    • https://site-1174448.mozfiles.com/files/1174448/jotizifagajureza.pdfIn PDF document text
    • https://gabejopow.weebly.com/uploads/1/3/4/5/134597712/cdf8a031.pdfIn PDF document text
    • https://site-1194623.mozfiles.com/files/1194623/hotstar_app_for_samsung_smart_tv.pdfIn PDF document text
    • https://site-1196011.mozfiles.com/files/1196011/56111767350.pdfIn PDF document text
    • https://zijunuriv.weebly.com/uploads/1/3/4/8/134892089/f76d3181e3af7.pdfIn PDF document text
    • https://cdn.sqhk.co/vefapatape/jPJnShf/mimomexenel.pdfIn PDF document text
    • https://cdn.sqhk.co/kipebakebe/hfemeie/14363779923.pdfIn PDF document text
    • https://site-1206392.mozfiles.com/files/1206392/android_studio_sdk_tools_directory_is_missing.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/xisefowu/sulasosunaparewefosag.pdfIn PDF document text
    • https://s3.amazonaws.com/sobaketemu/bojaxapodawenutogobiz.pdfIn PDF document text
    • https://s3.amazonaws.com/fedufiporara/buvef.pdfIn PDF document text
    • https://s3.amazonaws.com/tosego/64230808768.pdfIn PDF document text
    • https://s3.amazonaws.com/wupixufekijax/heart_to_heart_xenoblade_2_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/tugumeb/pupelelabimobituxojobo.pdfIn PDF document text
    • https://s3.amazonaws.com/loranoduzuja/jiromewazerosafu.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_off0000db2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB2D 5196 bytes
SHA-256: ce1faa3503f5adec6f93a5ad2406972ee0584a41614eba92308c2e2fabc9c4d7
font_01_sfnt_off0000ecb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECB7 11004 bytes
SHA-256: 31409f9b8ea2fa0a7f9394ea1ac0f2d85d1a5589606c54391a27aa4e99fb69fc

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