Malicious PDF — malware analysis report

Static analysis result for SHA-256 e819c73727bf1e09…

MALICIOUS

PDF

83.8 KB Created: 2021-03-09 21:01:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4c6e4b041ea0424641f2466ee286a41c SHA-1: 44e2e2af118ffa4ae486691c5d0d6f2dc22e5f30 SHA-256: e819c73727bf1e09d36347eeafc5187099832a5867cb8a62079a021021a12a2d
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many of which are part of a link farm designed to appear as legitimate content. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as a phishing trojan. The embedded links suggest an attempt to redirect users to malicious sites for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://dafemum.ru/award?keyword=beds+are+burning+guitar+tab+pdf
    • https://cdn.sqhk.co/vadavenaw/jgdZjju/minecraft_pocket_edition_skins_2020.pdf
    • http://xozowilozoga.mywebcommunity.org/us_covert_operations_manual_lexington.pdf
    • https://cdn.sqhk.co/setuboluraje/geigHrx/vufafuvorapikeraf.pdf
    • https://cdn.sqhk.co/xenivoronizu/gf4ayqG/project_manager_definition_by_different_authors.pdf
    • https://jokanile.weebly.com/uploads/1/3/5/9/135962808/zekudud.pdf
    • https://cdn.sqhk.co/tezofugowura/PYtKaha/helicopter_rescue_games_online.pdf
    • https://cdn.sqhk.co/pijuvedozuw/ggiibjg/music_player_pro_5._9_apk.pdf
    • https://pagopejej.weebly.com/uploads/1/3/5/3/135315805/vikalagepabe_jijajulazopiti_xineg.pdf
    • http://nanebaxexob.getenjoyment.net/13608176972.pdf
    • https://kuzogirig.weebly.com/uploads/1/3/4/7/134748708/5c842af.pdf
    • https://nuzivepumug.weebly.com/uploads/1/3/1/3/131379706/goguwifotut_fanuxevomoku_xetogajud.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://guvoperar.epizy.com/what_is_the_forbidden_fruit_in_islam.pdf
    • http://pefimubis.myartsonline.com/13160967284.pdf
    • http://zoferuwarutor.epizy.com/how_to_factory_reset_android_10._1.pdf
    • http://sazasewugekupej.onlinewebshop.net/how_to_measure_daily_stress.pdf
    • http://pasigajixivete.epizy.com/6860947829.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ff7a.bin
ff2bde42e925a929bb35a301df028ab049169da8c6bf9a9f7e7e30c696c9b6ca		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFF7A 5140 bytes
font_01_sfnt_off000110fd.bin
6717574b3d6471febea945ce4eebebad7b2ab35b2a6132ccc166cda5af6cba4d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x110FD 10092 bytes
font_02_sfnt_off00013398.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13398 4324 bytes

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