Malicious PDF — malware analysis report

Static analysis result for SHA-256 304b1a9f59efcc52…

MALICIOUS

PDF

65.2 KB Created: 2020-12-19 19:15:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: d8c5de574a671fd817a97a7051b27718 SHA-1: 341872695d03744c31cd76ccba8d9c73f9f77160 SHA-256: 304b1a9f59efcc5253ab6b10ff4733673ba987ea5815e90b14edfe0dbe16ada1
96 Risk Score

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 external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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://traffnew.ru/aws?utm_term=bikhra+hoon+main+mp4+video PDF link annotation
    • https://koxamuru.weebly.com/uploads/1/3/4/8/134890845/9914885.pdfIn PDF document text
    • https://zuwojutiraz.weebly.com/uploads/1/3/4/7/134729165/tazitupebopulitiz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486984/normal_5fcc1e12c455e.pdfIn PDF document text
    • https://tepunejor.weebly.com/uploads/1/3/4/6/134636279/8336248.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415534/normal_5fcfacb9e8c37.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/simujix/75889060019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/550a4c86-3401-4c37-a04e-ea7b35f95753/wozewekogoturo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc4e4191-38ad-43ba-a116-61ab42aad3c5/16789249310.pdfIn PDF document text
    • https://s3.amazonaws.com/dorulusof/27265862419.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e703c8b-b9ce-4218-8aa6-c716cfc9ad66/hyderabad_house_buffalo_grove_menu.pdfIn PDF document text
    • https://s3.amazonaws.com/nawuvud/causes_of_great_depression_apush.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a6df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA6DF 5248 bytes
SHA-256: c8d60b56d654d8e011092db4a128caf6ad652399773e78366af4d953ea53fdff
font_01_sfnt_off0000b89a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB89A 9444 bytes
SHA-256: 26ec60ce8944c1a047b3b797a73154f1e7d05dc69790e5b84cb76b70a817c88a
font_02_sfnt_off0000d8f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8F9 18776 bytes
SHA-256: 9e8409b995ac2b0bb76eb3eb8dd1c90fa55d1c1c8a40bb5daa08ca4080948d13