Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff0156fa4a34db78…

MALICIOUS

PDF

78.4 KB Created: 2021-05-19 23:31:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: ea83b99579fea96a051ee84c716b78ae SHA-1: 850d9280b8645377dbdab797afb83e9cef52f4df SHA-256: ff0156fa4a34db7800384c56b41bdd56ca82d0dcc5cc7230bab32bbd587ac91d
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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://kuzutuzo.ru/strik?utm_term=online+pdf+to+word+converter+free+download+for+windows+7 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4498882/normal_60599174988a6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476445/normal_600f835650c99.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418379/normal_6039164a113e0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417221/normal_605c7170baa5a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384832/normal_60353f89e0003.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380213/normal_5ff7e30de8412.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369332/normal_5feb002cdca37.pdfIn PDF document text
    • https://rotalexabif.weebly.com/uploads/1/3/1/3/131381819/magamuzipesinekuwun.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453338/normal_602cd69cafc53.pdfIn PDF document text
    • https://todilotifobaw.weebly.com/uploads/1/3/2/7/132712516/e0c376fb89b6fa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375196/normal_602e787ac9f0e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482219/normal_603b1a49ed4a8.pdfIn PDF document text
    • https://siputewebototab.weebly.com/uploads/1/3/4/4/134480832/demegatizi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459914/normal_60221096e9661.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382407/normal_60070be84eef6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/dbf40726-66c2-48ff-bfea-136ea10fd1c4/50742414755.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9638771f-4cad-469e-8b65-03fd16402165/19430902867.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_off0000f471.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF471 5408 bytes
SHA-256: 63d533f4dc33319a0b168c5dad93eaa2d1682635b05ee60836d1798e914c224a
font_01_sfnt_off00010703.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10703 10824 bytes
SHA-256: 30eb9ab7170175dc94a01ef836ca654eb60cbaa4a6d962f2532ee63753a5d81d

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