Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2ccfb772b38b6e5…

MALICIOUS

PDF

66.4 KB Created: 2020-12-07 12:03:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 18017860ff3eba78cd1f50bfcc227d07 SHA-1: 1895cd05d4cf2881cbfbec72ab779ead21911010 SHA-256: f2ccfb772b38b6e591132d10d35711a2282ce5f84386277da62d3a943764e063
156 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 a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://traffine.ru/123?utm_term=dead+space+apk+mod+unlimited+ammo PDF link annotation
    • https://tixanesel.weebly.com/uploads/1/3/4/2/134234664/vupitifafibubedo.pdfIn PDF document text
    • https://vadinako.weebly.com/uploads/1/3/4/8/134893839/zoronomobelazuj-kepadivatub-sibufomuna.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413712/normal_5fbe89107429f.pdfIn PDF document text
    • https://gasilarax.weebly.com/uploads/1/3/4/5/134595303/6560628.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368970/normal_5f9a0341cc852.pdfIn PDF document text
    • https://kupanonul.weebly.com/uploads/1/3/4/6/134682697/40a5e5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc13a23affbf90a66eca3c4/t/5fc415f6f81c9a2a0c222593/1606686199268/losebirevetijum.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc4fe50c30a162e0c6cbe8c/t/5fc64faaf3de5e49b53c3dc8/1606832043179/kiruwidorosakupirivezi.pdfIn PDF document text
    • https://s3.amazonaws.com/naxizugenabi/1077326029.pdfIn PDF document text
    • https://s3.amazonaws.com/febopa/culligan_water_softener_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/45783285263.pdfIn PDF document text
    • https://s3.amazonaws.com/jipowumat/lefokutirukalaf.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_off0000c5d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5D8 5188 bytes
SHA-256: bbfcd92c2a9f1f2eb628e2758ac2538c232d5e0e3f4e9c929cf5b85c6a736d1e
font_01_sfnt_off0000d77c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD77C 11372 bytes
SHA-256: 34be2ba0ddb01bcd09d6858bc124af3fef806bebb49bbea1320669adb3a13417