Malicious PDF — malware analysis report

Static analysis result for SHA-256 efeae86eb9b3a0dc…

MALICIOUS

PDF

73.6 KB Created: 2021-02-26 22:50:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 1fbf58ac8397dc6d00055a92d6608138 SHA-1: 85f9115823ff3a77d92931a522f63a1053ddb7a4 SHA-256: efeae86eb9b3a0dcd28dfdb576a53deba89400eb8effadc8edaf51cff52742d6
156 Risk Score

Malware Insights

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

The PDF contains a large number of embedded external links, a technique often used for SEO spam or to direct users to malicious sites. ClamAV and ML classifiers identified this file as malicious, specifically as a phishing trojan. The presence of numerous external links suggests an attempt to redirect users to potentially harmful content or phishing pages.

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://xezojetit.ru/wix?keyword=rise+to+globalism+american+foreign+policy+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4452193/normal_5fd099e6e2d56.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376602/normal_5ffe87af2e954.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383804/normal_60175a60d0d7c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471273/normal_5ff3a0996b05e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421208/normal_6016f89f488c8.pdfIn PDF document text
    • https://jexesatarufo.weebly.com/uploads/1/3/1/4/131437655/gevegufi_xikel_befit_ladizogumakaxup.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388619/normal_5fcd67657e349.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484994/normal_600e02de6a693.pdfIn PDF document text
    • http://feyakast.online/real_racing_3_obb_file_download_apkpure8ko0s.pdfIn PDF document text
    • http://mignonette.space/lobadojisukesafjxzij.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393369/normal_5ffddfb2c07c2.pdfIn PDF document text
    • https://muwalivom.weebly.com/uploads/1/3/2/6/132695892/kasiruf-pewol-losegimup.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_off0000e201.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE201 5724 bytes
SHA-256: f5d648d16edd76c1dba34cd46ea5fbdb437e70e712fcb0067bead935870c4c2a
font_01_sfnt_off0000f577.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF577 10532 bytes
SHA-256: 05783ba5f9d2e6e3e4fcef916470c9dc6815208d15ac0257c3dc953db9e34897

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