Malicious PDF — malware analysis report

Static analysis result for SHA-256 5557aee34a2eb278…

MALICIOUS

PDF

79.1 KB Created: 2021-05-08 11:36:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: d5d373212865c32e0c2ea8deda784df5 SHA-1: 1d48ad5d65f32bd891b31672ca84fef1e2b34462 SHA-256: 5557aee34a2eb278328d6081bc1c696027f4de89ea741add0ce0a46342d92e88
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses an urgency-based lure. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://dugedepap.ru/strik?utm_term=the+hunted+cast+2020 PDF link annotation
    • https://cdn.sqhk.co/pulafefer/if0UYhg/zejalokunafujawenezodibut.pdfIn PDF document text
    • https://cdn.sqhk.co/xonudutixova/gwAD4jb/67300192715.pdfIn PDF document text
    • https://cdn.sqhk.co/fowifabibu/iiHgcgg/secret_agent_rescue_mission_3d_game_download.pdfIn PDF document text
    • http://ovca.space/38495752369nwg6j.pdfIn PDF document text
    • https://cdn.sqhk.co/bisidilit/AiahiXZ/mofepexukirixenifupid.pdfIn PDF document text
    • http://kobivoweder.mypressonline.com/18369779881.pdfIn PDF document text
    • https://cdn.sqhk.co/pisomuma/jjNia0G/81055602355.pdfIn PDF document text
    • https://cdn.sqhk.co/detatakev/fmijyFD/dream_scenes_sandbox.pdfIn PDF document text
    • http://carinsusa.info/spectrum_math_workbook_grade_8_free92cvz.pdfIn PDF document text
    • http://nazevulilabume.66ghz.com/movimiento_caida_libre.pdfIn PDF document text
    • https://cdn.sqhk.co/xupebasolaw/RjjEcZz/combine_excel_files_to_one_sheet_vba.pdfIn PDF document text
    • https://cdn.sqhk.co/livatunozasu/9ttl9tx/cuballama_recarga_oferta.pdfIn PDF document text
    • https://cdn.sqhk.co/pazaxefuma/KWYicjf/65838838205.pdfIn PDF document text
    • http://rigoditibalun.mywebcommunity.org/can_you_inject_contrast_through_a_central_line.pdfIn PDF document text
    • https://cdn.sqhk.co/wufotubi/gcgfhid/alia_bhatt_star_life_mod_apk_hack_download.pdfIn PDF document text
    • http://zanartcc.net/xojevkpc07.pdfIn PDF document text
    • http://exemplpusj.com/free_shareholder_agreement_template_australia1kcct.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://8767aa75-4bd5-48c0-94ca-24e983238001.filesusr.com/ugd/debdc1_12ad9e0b8d2f48188badb9a94cbc368a.pdf?index=trueIn PDF document text
    • https://0ffdd24b-620b-4f4d-94ef-a39da1ca20bd.filesusr.com/ugd/853ce2_b4bb8277c9dc45c9931f21bdd76f3448.pdf?index=trueIn PDF document text
    • https://fefcf4f0-bf52-4086-adb3-b788df03f7bd.filesusr.com/ugd/da9d4c_2a6dab7f5a5b4454ba449a1954518dee.pdf?index=trueIn PDF document text
    • http://kodibonu.rf.gd/enga_karuppasamy_god_songs_free.pdfIn PDF document text
    • https://32cf4326-ba62-484c-a3ca-05d02c2dd2e5.filesusr.com/ugd/0b46e6_286855d4ac2647df9aa7d20c1fec1c5f.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f63c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF63C 5120 bytes
SHA-256: 7a89e1639b4ac90104aa34a8b126d68a18e1a09232fe4f60d9f2e313b0f62955
font_01_sfnt_off0001079d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1079D 11324 bytes
SHA-256: 3516e2f91127cda5120647fc3bc13ad67642d5b914673cd9e5b2c27e3559d33f