Malicious PDF — malware analysis report

Static analysis result for SHA-256 345f9051f88b7156…

MALICIOUS

PDF

78.5 KB Created: 2020-12-02 08:06:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 6ef9d7eeae9bdcd8609e4c7899d2cb47 SHA-1: 28510880793a05f2064c1bcca6f08916a7a2b5ce SHA-256: 345f9051f88b7156ccf10eafe2542994af5acdbe65b09c4df51b1e34fd16e2c4
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with one pointing to a suspicious URL that appears to be part of a link farm designed to attract traffic. ClamAV detection and ML classification strongly indicate malicious intent, specifically identified as a phishing trojan. The presence of embedded URLs and the overall structure suggest this PDF is designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://traffnew.ru/aws?utm_term=hackintosh+high+sierra+laptop+guide PDF link annotation
    • https://segojojozifad.weebly.com/uploads/1/3/4/3/134324481/4310956.pdfIn PDF document text
    • https://nodararikerat.weebly.com/uploads/1/3/4/8/134885074/e3c032e9.pdfIn PDF document text
    • https://lonuxomefuju.weebly.com/uploads/1/3/4/8/134871759/pupita-lexevadidefiv-xuxumogofa.pdfIn PDF document text
    • https://keniwuki.weebly.com/uploads/1/3/1/4/131483234/mikukinib.pdfIn PDF document text
    • https://xegiwisupanax.weebly.com/uploads/1/3/4/3/134367095/letax.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/xisefowu/access_nested_iif_statement_expression.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/gafetesivopefijapuvi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bec1209b-807e-4996-acf0-03893f4bc2c3/dedemipikalugejizusemu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e727c8e0-8d4b-4ce8-a4f3-489a2fce3d0f/adobe_acrobat_dc_crack_free_download.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_off0000f6e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6E5 5360 bytes
SHA-256: c0a8e39b9179f4a1ceb32bc8573b11812b7e409c96b49dd631ee82597b20ced1
font_01_sfnt_off00010915.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10915 10892 bytes
SHA-256: a1c741d24aa8b7b9664b45c1ce4361d345f61a5142ddc18f1f388670879c860c