Malicious PDF — malware analysis report

Static analysis result for SHA-256 a879c4bba9174748…

MALICIOUS

PDF

92.0 KB Created: 2021-04-07 11:22:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 8b01dcf2e17a5467903247de33ee5648 SHA-1: c661f776aa81ed9cd9360e378e3cd9343c770742 SHA-256: a879c4bba917474830bf06a64742c3c51f8f6a611da5b716e15305be2da13ceb
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous external URIs, many pointing to disposable hosting, suggesting a link farm or phishing attempt. The document body, though heavily obfuscated, appears to be a lure related to a 'surf report', likely intended to trick users into visiting malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://mezovuduw.ru/123?utm_term=folly+beach+surf+report+sc PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4366645/normal_6017ce5bd2695.pdfIn PDF document text
    • https://cdn.sqhk.co/fidapulano/jhA5fFV/26216445431.pdfIn PDF document text
    • http://sandwichhq.club/40343820474uh6lc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366952/normal_605f1a6f0d519.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501660/normal_6005e2d928958.pdfIn PDF document text
    • http://tdsevsvet.ru/why_would_a_smoke_detector_blink_redpxx61.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458631/normal_5fe90e3fd4a77.pdfIn PDF document text
    • https://cdn.sqhk.co/webuzifinuno/yjjjhha/wire_size_calculator_mm2_ac.pdfIn PDF document text
    • http://sfhgfje5df.xyz/how_to_use_paper_studio_self_adhesive_vinylx0yz0.pdfIn PDF document text
    • https://cdn.sqhk.co/legusovej/bbhdaif/wisemikasovapujawudikazib.pdfIn PDF document text
    • http://indital.fun/english_song_video_download_pagalworldrj47f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://4bf641bf-117a-4913-931f-55e49063997f.filesusr.com/ugd/5befcb_ff5c2e045e8b4406a82c98711ac1a12a.pdf?index=trueIn PDF document text
    • http://mirajeramevex.rf.gd/xupowivifumifajurivajeb.pdfIn PDF document text
    • https://s3.amazonaws.com/julaxel/jetoxaxazazokobu.pdfIn PDF document text
    • https://83f018a0-8e49-44f0-b57e-805e464a5f06.filesusr.com/ugd/10a4aa_0e04ffa790c4494db3e2a1c160720b9c.pdf?index=trueIn PDF document text
    • https://54e283d8-6946-47af-b6e3-c78582312647.filesusr.com/ugd/22cd47_a9f014d6ff1a4581a3c7cfc13d88420b.pdf?index=trueIn PDF document text
    • https://6d4cd3b7-91e9-43ac-92b9-205473f1e50d.filesusr.com/ugd/28146e_c9308ee38d53468a86d50e7e8b80cc6c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zepifudoxapo/gibeja.pdfIn PDF document text
    • http://zonuzaxesinok.rf.gd/what_is_starship_trooper_by_yes_about.pdfIn PDF document text
    • https://35548484-ce42-4b18-9d9d-834326683263.filesusr.com/ugd/a221b6_a95168ba96dc4fc385d02917a42cfe8c.pdf?index=trueIn 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000128c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128C0 5300 bytes
SHA-256: e0237298e7ea3f36e50fac618f18d19234aa49c0a5b8f9fd017f61a4326251d1
font_01_sfnt_off00013ac7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13AC7 11884 bytes
SHA-256: 5c33f584a967c4d1ee42f140879b155c22d1afd2f451454be7253824a9bea210

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