Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b8593ca27deac6f…

MALICIOUS

PDF

67.6 KB Created: 2021-03-14 12:45:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: b2302c4b986698684c9e8bc963b915cc SHA-1: e444a052daa7a3c714e972928a283e84a4ab4506 SHA-256: 7b8593ca27deac6f4eeb4483efb503a76143bd06283bbd2c518df823d18e8b12
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution attempt. It contains numerous external URLs, with one prominent URL pointing to 'botokaw.ru', suggesting it's designed to redirect users to potentially harmful content. The PDF structure and embedded links indicate a link farm tactic, likely to obscure the final malicious destination.

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://botokaw.ru/123?utm_term=3d+exterior+model+free++for+max PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4481999/normal_6028422e3bd60.pdfIn PDF document text
    • https://sitepofom.weebly.com/uploads/1/3/1/4/131438718/taxixizeduxaj.pdfIn PDF document text
    • http://alcexpress3.xyz/google_drive_ant_manb1l34.pdfIn PDF document text
    • http://lnstagram-blue-badge-form.com/cherie_deville_doctorvajwz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476275/normal_602e2993e1669.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376849/normal_5fd78d054c820.pdfIn PDF document text
    • https://zugufirit.weebly.com/uploads/1/3/1/1/131163535/duniruzineduku_rasonu_kitominor_foponekef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473359/normal_5fd63464b3ee8.pdfIn PDF document text
    • http://razvivatel.blog/4574740695x1c32.pdfIn PDF document text
    • http://tekeriset.iblogger.org/7235159777.pdfIn PDF document text
    • http://goproonly.com/jusinanomiw4mpw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500429/normal_5fd787659c906.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://luwulifinuneti.epizy.com/gonorrhea_cdc_fact_sheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e488e75-c382-4826-8db4-2fb9720ef973/atlantic_fleet_free_download_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c884ac7b-1754-4e45-80e1-7113c63226e8/44491734193.pdfIn PDF document text
    • https://764dfaed-7091-4b1c-a8ff-ceb5b694923f.filesusr.com/ugd/4bafdb_09f1153fae194da6a04fb2f435b91ddf.pdf?index=trueIn PDF document text
    • http://pinaroz.rf.gd/femivozefesefi.pdfIn PDF document text
    • https://ef733714-782c-48ea-8991-1bc0bf0c95f2.filesusr.com/ugd/ad2ade_c73f32ed2e6d40bb93f46a573bca334f.pdf?index=trueIn PDF document text
    • http://foraxukesog.rf.gd/legunolifivatatepivuf.pdfIn PDF document text
    • http://gevewodex.epizy.com/35304176502.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_off0000cc53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC53 5012 bytes
SHA-256: eaf7ab926d1b49606b8a6ae254a76d713d66c451e3729674fca58af4791cdcc1
font_01_sfnt_off0000dd4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD4D 10020 bytes
SHA-256: b7e5a86d6f852ffdfc07b334e343decf1f6482ad0c37853afb39c1f87923de83

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