Malicious PDF — malware analysis report

Static analysis result for SHA-256 2bf6173575c1b042…

MALICIOUS

PDF

79.7 KB Created: 2021-02-28 12:39:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 184aca76e27e772ae082170b6cc26485 SHA-1: acaec2d1acd5ee2c01a3e7d168e08349d5ab7973 SHA-256: 2bf6173575c1b042080d81d37e0dc149787b73027f6fc837069ffa562d2edde0
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a machine learning classifier and ClamAV, indicating malicious intent. It contains numerous embedded URLs pointing to potentially malicious domains, suggesting it functions as a link farm or a phishing lure. The presence of external URIs and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic strongly suggest the document's purpose is to redirect users to other sites, likely for malware distribution or credential harvesting.

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/wb?keyword=shakespeare%20macbeth%20quotes%20witches PDF link annotation
    • http://vijevejumozugim.sportsontheweb.net/english_for_writing_research_papers_useful_phrases.pdfIn PDF document text
    • http://nejupike.mygamesonline.org/47445610563.pdfIn PDF document text
    • https://cdn.sqhk.co/vanewano/hgBqL5N/warplanes_ww1_sky_aces_pc_download.pdfIn PDF document text
    • https://cdn.sqhk.co/kogewole/eL2haFB/stickman_dash_hook_up.pdfIn PDF document text
    • https://cdn.sqhk.co/tusenepobam/9zjewhg/crash_io_3d_io_games.pdfIn PDF document text
    • https://cdn.sqhk.co/jukunobegabe/bggg53U/zidexuvilonefurovek.pdfIn PDF document text
    • https://cdn.sqhk.co/xeviremal/A25icii/marvel_runaways_season_2_episode_12.pdfIn PDF document text
    • https://cdn.sqhk.co/rowazazapa/lJgjzIh/birds_of_prey_2002.pdfIn PDF document text
    • https://cdn.sqhk.co/figoveraboj/ggUGsnS/merge_and_dragons_level_115.pdfIn PDF document text
    • http://sevezor.scienceontheweb.net/wumizubafama.pdfIn PDF document text
    • https://cdn.sqhk.co/nakunadubux/ddhemib/32044894199.pdfIn PDF document text
    • http://kesuvajeb.scienceontheweb.net/how_to_integrate_csc.pdfIn PDF document text
    • https://cdn.sqhk.co/dexijonur/bJCkcig/superhero_fire_fighters.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/dopugaxelelema/24910073789.pdfIn PDF document text
    • http://bexukavibume.myartsonline.com/45055620187.pdfIn PDF document text
    • https://s3.amazonaws.com/vavebufevodutob/sevajuwojex.pdfIn PDF document text
    • http://xovolefewawex.atwebpages.com/wodefimebowojurexidamo.pdfIn PDF document text
    • http://peledopa.myartsonline.com/ac_joint_separation_band_exercises.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000edbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDBB 5440 bytes
SHA-256: b927fa6b9393d4cab22c60072a25a927df5546957ad126dece289c1204be24ba
font_01_sfnt_off0001004d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1004D 10296 bytes
SHA-256: 449337c6e5bc1b746932ff08e0799df8972b24f2541da38b4213325f986e2354
font_02_sfnt_off000123a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123A6 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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