Malicious PDF — malware analysis report

Static analysis result for SHA-256 75c4d4271d1f8c03…

MALICIOUS

PDF

72.3 KB Created: 2021-02-21 15:53:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: d77ebfa6c317185495c639eb8cb955e3 SHA-1: 7c9225bf4b35a72682fbf0b46df54ed97092ae24 SHA-256: 75c4d4271d1f8c038426f18702730c07cc0d02ac4f8e21ded69e2373139bdf93
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to PDF files, indicating a link farm or redirection mechanism. The ClamAV detection and ML classifier strongly suggest malicious intent, specifically identified as phishing. The document body, though heavily obfuscated, suggests a lure related to 'farmer background'. No scripts were extracted, but the presence of numerous external links points towards a phishing or malware distribution attempt.

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://baarspo.ru/wix?keyword=farmer+background+5e PDF link annotation
    • http://wumalazari.22web.org/goxaralibo.pdfIn PDF document text
    • http://tibetterrier.ru/salejaludnyp0.pdfIn PDF document text
    • https://bifukedupojuxi.weebly.com/uploads/1/3/4/4/134498794/e052d.pdfIn PDF document text
    • http://pexukakadom.22web.org/32649506116.pdfIn PDF document text
    • http://eurostore.info/97043622888elfeo.pdfIn PDF document text
    • http://carluxepaint.site/job_fair_flyer_template_word_free8rwac.pdfIn PDF document text
    • http://gabofovopajojo.iblogger.org/dosex.pdfIn PDF document text
    • http://robinmani.site/baofeng_uv-5r_plus_programming_chirpw2rd2.pdfIn PDF document text
    • http://fridgeservice.ru/73387236124aehdl.pdfIn PDF document text
    • https://vezinamitin.weebly.com/uploads/1/3/5/9/135984824/7e1e0b4287a1a.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/kofabube/55551576217.pdfIn PDF document text
    • http://zelavejifokekoj.epizy.com/retorigobo.pdfIn PDF document text
    • https://s3.amazonaws.com/lixisariwulo/sadititivoxidabitoxoger.pdfIn PDF document text
    • http://puzuzebud.epizy.com/best_watermark_software.pdfIn PDF document text
    • https://s3.amazonaws.com/sakaburepagase/tevojisenomatabatik.pdfIn PDF document text
    • http://safodur.epizy.com/new_practical_chinese_reader_textbook_vol._2.pdfIn PDF document text
    • https://s3.amazonaws.com/punurum/pofaz.pdfIn PDF document text
    • https://s3.amazonaws.com/zesotat/alcohol_120_latest_version_free.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_off0000df90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF90 5332 bytes
SHA-256: 54dd857eaf70288c3b59f8d6f5b76b5fa87155e55ee04453a9910db10af202a9
font_01_sfnt_off0000f1a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1A0 10104 bytes
SHA-256: baa9fcaa4e983142ee4a415183fcd8b918a7117360eb939e945582d964b504c5

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