Malicious PDF — malware analysis report

Static analysis result for SHA-256 39d9806a65979d54…

MALICIOUS

PDF

66.6 KB Created: 2020-12-23 10:55:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 2dbaaf72734b67d566a129c43952b822 SHA-1: 7c4e849afc4fa24aac71d733e30fa7baa168c16e SHA-256: 39d9806a65979d54eaf38dd8df72e7a056111ef441ef726a82c77f52c638ec12
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, indicating an attempt to lead the user to a harmful site. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery. Although the document body is heavily obfuscated, the presence of a malicious URL is the primary indicator of the attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://cctraff.ru/strik?utm_term=moto+rush+gt+gameplay In PDF document text
    • https://cdn-cms.f-static.net/uploads/4412905/normal_5fae62ae806dc.pdfIn PDF document text
    • https://bolojowugupi.weebly.com/uploads/1/3/4/8/134886087/fofaruxew_wonumepafusiro.pdfIn PDF document text
    • https://murepofolod.weebly.com/uploads/1/3/4/4/134480544/1df02c07c8b6bf.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/142c8470-8e62-4a6d-a5b0-d1237fb11395/15665494854.pdfIn PDF document text
    • https://s3.amazonaws.com/garorowa/south_carlsbad_state_beach_day_use_parking.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc3486312facd59cebc5192/t/5fc3e1b4a97599144e6f79c0/1606672821625/dojutufomuludidunurepaxan.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fcec473dd72e92376474a80/t/5fd1700ea9eaf43bd8492253/1607561231972/mureluzeradekudox.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc3342111f6a4198494abb4/t/5fc9372836a13c1fdd59e581/1607022377273/falling_lyrics_wdw.pdfIn PDF document text
    • https://s3.amazonaws.com/nabifovu/milagunifokojiso.pdfIn PDF document text
    • https://s3.amazonaws.com/jojitagifuva/ajit_doval_image.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_off0000c8e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8E4 5340 bytes
SHA-256: 53595513c13fe98f334f3b70542f3b8afcde86976a448feca3040a5dfccd9165
font_01_sfnt_off0000daf9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAF9 10308 bytes
SHA-256: 2425ebebfd3731dd50050b1366b4357f67f52a51ec8c5e5b3d1011de7d2a899d