Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac589c30c6f66718…

MALICIOUS

PDF

65.2 KB Created: 2020-12-18 23:32:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 39160603295773280106de8550baa7d9 SHA-1: 59ebac11f08cd0040f65f1692c99b933910a7a46 SHA-256: ac589c30c6f66718f89ae12ff41291f1a6278f76eb7c2a08d97f9783622e4059
164 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to suspicious domains, indicative of a link farm or phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic indicate the document is designed to redirect users to other malicious or spammy content, likely to distribute malware or facilitate phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://trafftec.ru/aws?utm_term=tunnelbear+vpn+unlimited+apk PDF link annotation
    • https://vunixumo.weebly.com/uploads/1/3/1/4/131453253/jinetavude-xosal-voxekedaxolenet.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366389/normal_5f9cecbe8ffb7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412599/normal_5fc70d33c33ab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401696/normal_5f927afba1626.pdfIn PDF document text
    • https://gugabezari.weebly.com/uploads/1/3/4/5/134577353/8301681.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366984/normal_5f87f4c37ec8d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449615/normal_5fa89fdc85ef4.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/5fce1b00e68b41342bab23f3/t/5fd189b3071bbc688023353e/1607567795871/run_rate_sales.pdfIn PDF document text
    • https://s3.amazonaws.com/rufonali/dositojirijorumusubu.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/97277635119.pdfIn PDF document text
    • https://s3.amazonaws.com/benuka/associer_les_fichiers.pdfIn PDF document text
    • https://s3.amazonaws.com/jefobexapulow/maplestory_equipment_guide_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/jevuxozazebazug/kadena_high_school.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc4c1c6c30a162e0c6b3e12/t/5fca2b39196a600d3c3aaea0/1607084857950/phonograph_music_player_pro_apk_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_off0000c222.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC222 5140 bytes
SHA-256: 7bc6719593a45d361f24fdcdb2c3f571271aa518d1d3de91b0e86545e91ab0bb
font_01_sfnt_off0000d389.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD389 10808 bytes
SHA-256: 00bffd7b959047635a153cabec5df357b795aa5851078283466d09618d61be69

Open this report in the interactive analyzer, or submit your own file for analysis.