Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2dfe1c0ff58163b…

MALICIOUS

PDF

72.1 KB Created: 2021-01-20 17:34:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 7c16a56185958abe6d42eb90de9f81d9 SHA-1: 800002bb66340f84bcfb8e5eac504e2af82700e5 SHA-256: b2dfe1c0ff58163bc3ef4c04727203ac2d3dd4c2dfc8b4dd5ca71a0e1fa8c7e4
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded links pointing to various domains, indicating a link farm likely used for phishing or malware distribution. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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 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://traffnew.ru/123?utm_term=in+mrp+system+nervousness+is+caused+by PDF link annotation
    • https://cdn.sqhk.co/nonuripot/djhjjhj/make_field_goal_kicking_tee.pdfIn PDF document text
    • https://pawizujepus.weebly.com/uploads/1/3/1/6/131637171/wekozu-lovowudonipupex.pdfIn PDF document text
    • https://tekikolunusujok.weebly.com/uploads/1/3/5/3/135304640/3999805.pdfIn PDF document text
    • https://site-1168144.mozfiles.com/files/1168144/ice_hockey_camp_melbourne.pdfIn PDF document text
    • https://cdn.sqhk.co/jozojonujaj/hiCpgi7/best_romantic_ringtone_download_mp3_pagalworld.pdfIn PDF document text
    • https://site-1176033.mozfiles.com/files/1176033/unofficial_remixes_on_spotify.pdfIn PDF document text
    • https://site-1175201.mozfiles.com/files/1175201/blank_search_warrant_template_texas.pdfIn PDF document text
    • https://site-1183820.mozfiles.com/files/1183820/zijedavixasivabu.pdfIn PDF document text
    • https://cdn.sqhk.co/nuxarufodir/wgjiggd/1344336205.pdfIn PDF document text
    • https://site-1174122.mozfiles.com/files/1174122/kogoseg.pdfIn PDF document text
    • https://site-1255029.mozfiles.com/files/1255029/boat_bill_of_sale_word_template_free.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413236/normal_5f9cfbe3d8489.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368497/normal_5f906c91242e5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393635/normal_60024988933be.pdfIn PDF document text
    • https://site-1202186.mozfiles.com/files/1202186/16364553837.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450347/normal_5feb79909cdd8.pdfIn PDF document text
    • https://site-1180945.mozfiles.com/files/1180945/centipede_game_app.pdfIn PDF document text
    • https://jesofoxera.weebly.com/uploads/1/3/1/4/131407857/jiwuremifug.pdfIn PDF document text
    • https://gofolepoxi.weebly.com/uploads/1/3/4/8/134882907/67f1b7187a1319f.pdfIn PDF document text
    • https://kegozorud.weebly.com/uploads/1/3/0/7/130740561/2853516.pdfIn PDF document text
    • https://site-1199467.mozfiles.com/files/1199467/bootstrap_datepicker_reactive_form.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/mivokozibu/53245956289.pdfIn PDF document text
    • https://s3.amazonaws.com/boxujetanonikuv/light_and_shadow_worksheets_grade_6.pdfIn PDF document text
    • https://s3.amazonaws.com/ponivotigegepub/android_dns_adblock.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_off0000dcbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCBE 5428 bytes
SHA-256: 521bf60b6323ed9b6857465ae2749af79c9922d297f577b1384f429914ed9d3e
font_01_sfnt_off0000ef20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF20 10868 bytes
SHA-256: 2aadb79cbf6062467c2d44d47279fcbcc9a2deb02948eaae15a1122b87186b31

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