Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9231b8b8558f8f0…

MALICIOUS

PDF

69.5 KB Created: 2021-02-27 06:36:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 67bafecd48f81964cb8c7e7932523df2 SHA-1: 23a61fcd5cd69e712fa9d1a95ff902730614dd92 SHA-256: d9231b8b8558f8f077489fad531d556adcc1aebbc5eb6a6984fea7b38cf94696
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many of which are part of a link farm designed to improve search engine rankings, a common tactic for phishing or malware distribution. The primary URL, 'https://soxebez.ru/wix?keyword=hello+neighbor+apk+1.0', suggests a lure to download an application. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware delivery.

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://soxebez.ru/wix?keyword=hello+neighbor+apk+1.0 PDF link annotation
    • https://dikemogegopur.weebly.com/uploads/1/3/1/4/131406608/lubox.pdfIn PDF document text
    • https://bunofavaluz.weebly.com/uploads/1/3/4/6/134661637/zodanus.pdfIn PDF document text
    • https://sipigatijuk.weebly.com/uploads/1/3/3/9/133999294/fenolifivadunag.pdfIn PDF document text
    • http://rowowevu.mypressonline.com/81137696491.pdfIn PDF document text
    • https://wazurewimi.weebly.com/uploads/1/3/4/5/134598950/2435245.pdfIn PDF document text
    • https://bavifevip.weebly.com/uploads/1/3/6/0/136049805/xuxunodamuwit.pdfIn PDF document text
    • https://koxizekeb.weebly.com/uploads/1/3/4/7/134770308/b3d570da6af1.pdfIn PDF document text
    • https://cdn.sqhk.co/gokitoser/GmiaJFY/83166539936.pdfIn PDF document text
    • https://pakitaxe.weebly.com/uploads/1/3/4/3/134318313/9820463.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/wejuvono/wasizugogi.pdfIn PDF document text
    • https://s3.amazonaws.com/regufojalojaza/shazam_apk_for_huawei.pdfIn PDF document text
    • https://s3.amazonaws.com/somisilegex/fotojitajijo.pdfIn PDF document text
    • https://s3.amazonaws.com/sefiwegegagu/mesebutovejejufeve.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cad7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAD7 5004 bytes
SHA-256: bf8f01f76fa617da8c05cf741ff7d9ab8154d8fdef4080c1638203f5807daa9f
font_01_sfnt_off0000dbbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBBF 9268 bytes
SHA-256: 77ce922fbed4c31291baa3b3de06568ec35633276f3a5ba458114f98d44b53a1
font_02_sfnt_off0000fb85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB85 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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