Malicious PDF — malware analysis report

Static analysis result for SHA-256 560000a8ede99bb6…

MALICIOUS

PDF

82.5 KB Created: 2021-02-14 03:21:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 50a174bcdcb421ccda1c7e677877ddf7 SHA-1: 083d48ce044db8746a5bc705fae38ef6ece4a412 SHA-256: 560000a8ede99bb64e51db385c4179b20638335c650952ebf3c966557c67f03d
184 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics as malicious, including a critical alert for linking to known malicious redirector infrastructure. The embedded URLs, particularly 'https://crophysi.ru/aws?utm_term=rada+banjo+song++mr+jatt', are indicative of a phishing or malware distribution attempt. While no scripts were explicitly extracted, the nature of the links and the ML classifier output strongly suggest malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/aws?utm_term=rada+banjo+song++mr+jatt In PDF document text
    • https://cdn.sqhk.co/zezaxemepe/5jjhibo/head_to_tail_vector_addition_diagram.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446917/normal_6012f91c2a258.pdfIn PDF document text
    • http://tuligofabuwisa.22web.org/lidasemor.pdfIn PDF document text
    • https://cdn.sqhk.co/nejijilo/iVjifhb/eve_echoes_mining_spreadsheet.pdfIn PDF document text
    • http://wuwibapuwete.22web.org/sandtex_trade_high_cover_smooth_data_sheet.pdfIn PDF document text
    • https://cdn.sqhk.co/xelajuwodaf/higfPax/81978846647.pdfIn PDF document text
    • https://cdn.sqhk.co/beledufe/jeyDehi/nt_wallet_account.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422914/normal_5fda4b2433e02.pdfIn PDF document text
    • http://nazawate.iblogger.org/woguturojixilonaw.pdfIn PDF document text
    • https://cdn.sqhk.co/jarogofef/fjchjaO/edulog_parent_portal_lite_app.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/kalanejaxutilif/pdf_marketing_management_by_philip_kotler.pdfIn PDF document text
    • http://jalovunenenema.epizy.com/guvegijuzamixibavorurok.pdfIn PDF document text
    • https://s3.amazonaws.com/salosibejodod/descargar_video_converter_pro_vidsoftlab_apk.pdfIn PDF document text
    • http://xuwuputapu.epizy.com/adding_fractions_exercises.pdfIn PDF document text
    • https://s3.amazonaws.com/davolazupivowi/10328197341.pdfIn PDF document text
    • http://ranajugupavogoj.rf.gd/13734531157.pdfIn PDF document text
    • https://s3.amazonaws.com/xamibebulosaxug/calisthenics_workout_and_diet_plan.pdfIn PDF document text
    • http://beperedusewigu.epizy.com/telugu_action_movies_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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e306.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE306 4960 bytes
SHA-256: 0281cf78aab486376e2206aef700c87ab6ab4ff040242a14da8dc45ce0b0ef56
font_01_sfnt_off0000f3c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3C4 10868 bytes
SHA-256: c13b85788ee5683803446ff8f1f1cf0e7319af2fca690b53616d657999aff345
font_02_sfnt_off0001194d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1194D 16164 bytes
SHA-256: c41fc46809d2260d2d1a821cef6bb00dae560fdbad380da94a93f29d012df54e
font_03_sfnt_off00012e62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E62 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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