Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5fcc4fad2fd8e3c…

MALICIOUS

PDF

76.1 KB Created: 2021-02-26 07:25:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: bdb3c43a210345882758c108cd42ef69 SHA-1: 924ac04e19652c9651032daf3b08f8626e3f1d44 SHA-256: c5fcc4fad2fd8e3c2fc6dd6e2fec6c1bfab59af1f51239ed555f0ba118a8b5ee
154 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and multiple external URIs, indicating an attempt to redirect the user to malicious websites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery. The presence of embedded JavaScript points to T1059.007, and the nature of the PDF suggests it was delivered as a spearphishing attachment (T1566.001).

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Malformed active-content stream length medium PDF_MALFORMED_EXPLOIT_STREAM_LENGTH
    A PDF stream that carries active/exploit-looking content has a declared /Length that does not match the recovered stream body. Malformed stream boundaries and length mismatches are common parser-evasion/supporting evidence around Reader exploit streams.
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://bologen.ru/123?utm_term=roland+tr8s+user+review PDF link annotation
    • http://tejovotemikodes.getenjoyment.net/john_boardman_alexander_the_great_from_his_death_to_the_present_day.pdfIn PDF document text
    • https://cdn.sqhk.co/guxudakakali/CHgiOhi/supercheap_transmission_oil_cooler.pdfIn PDF document text
    • https://cdn.sqhk.co/xusawikorut/2ja5hhc/razise.pdfIn PDF document text
    • http://jirafka.space/ethical_hacking_course_books_freevju60.pdfIn PDF document text
    • https://cdn.sqhk.co/rolaravez/wLhjEQm/76542948724.pdfIn PDF document text
    • http://bogplaktnc.fun/kuwowodanuvogomexezuxubtuucn.pdfIn PDF document text
    • https://cdn.sqhk.co/gunobawiwax/aWw2GNi/fiwub.pdfIn PDF document text
    • http://instacopyrighthelpteam.com/articles_exercises_perfect_english_grammarzf14d.pdfIn PDF document text
    • http://ourfanz.com/free_movies_for_mobile_phones_mp424zkg.pdfIn PDF document text
    • https://cdn.sqhk.co/pasepizut/XyWFBzJ/best_graphic_design_software_online.pdfIn PDF document text
    • https://cdn.sqhk.co/xafiguzi/fhb8Co8/xetudoxak.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/wetowuzuxit/blank_timeline_template_word.pdfIn PDF document text
    • https://s3.amazonaws.com/fonazuzixagizir/44545271983.pdfIn PDF document text
    • http://sutexuvidag.myartsonline.com/stihl_bg_56_best_price.pdfIn PDF document text
    • http://zogadawedalifap.onlinewebshop.net/leica_m6__m7.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_off0000ed57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED57 5172 bytes
SHA-256: 88baac6ca37c27a59423b20ff4e7b38a33c080edd42c5a8e2fe6e7db28f367b3
font_01_sfnt_off0000ff0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF0F 10596 bytes
SHA-256: 7eff108baa79bb620f46839624049620f95f24f634739e33b57ae46dabc39450

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