Malicious PDF — malware analysis report

Static analysis result for SHA-256 edf4c90d70027b68…

MALICIOUS

PDF

77.1 KB Created: 2021-02-25 18:02:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: cfb906354ea63f5d66b390602efa79f4 SHA-1: fa06557a9d15704e76e005b7e591881e624fd53e SHA-256: edf4c90d70027b68b43b02c420ccf2935fd12d98e3083702fbac6d0d1897be47
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. 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 0.9998

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 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.
  • 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/strik?utm_term=lies+of+locke+lamora+book+4+release+date PDF link annotation
    • http://rubewox.sportsontheweb.net/obs_7.3_powerstroke_fuel_line_diagram.pdfIn PDF document text
    • http://faxusupovetek.sportsontheweb.net/how_to_get_audio_on_night_owl_cameras.pdfIn PDF document text
    • https://gilepinewuje.weebly.com/uploads/1/3/4/0/134096317/7812711.pdfIn PDF document text
    • http://zebinoleruf.iblogger.org/dulubiwegirorome.pdfIn PDF document text
    • https://lexapokugivida.weebly.com/uploads/1/3/1/8/131856754/mixusasem-zoxis-detote-vejugix.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/tixedujegibex/nikon_n90s_film_camera.pdfIn PDF document text
    • http://lurosanonit.epizy.com/sps_commerce_acquisition.pdfIn PDF document text
    • https://s3.amazonaws.com/tikofaketonub/mosemilumuvarokesoj.pdfIn PDF document text
    • http://bezopiwuzalobit.rf.gd/bot_twitter_iphone.pdfIn PDF document text
    • http://kifarir.rf.gd/dolizunerifupujefixop.pdfIn PDF document text
    • https://s3.amazonaws.com/jawusawar/assertiveness_skills_training.pdfIn PDF document text
    • https://s3.amazonaws.com/davolazupivowi/tegag.pdfIn PDF document text
    • http://tepuxasimu.rf.gd/world_cup_football_song_2018.pdfIn PDF document text
    • http://newabef.rf.gd/10564673150.pdfIn PDF document text
    • http://pinakebe.rf.gd/social_media_trends_report.pdfIn PDF document text
    • http://rozopujonabesix.epizy.com/83278767574.pdfIn PDF document text
    • http://dixisafujanen.rf.gd/bomenepezadugifu.pdfIn PDF document text
    • https://s3.amazonaws.com/minabiwa/kufozojifajevelivibo.pdfIn PDF document text
    • https://s3.amazonaws.com/napisakaluja/cycle_time_analysis_of_manual_work.pdfIn PDF document text
    • https://s3.amazonaws.com/guvovigo/majesty_and_glory_music_sheet.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_off0000eeae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEAE 5400 bytes
SHA-256: 0443d3e261b0edcb3c40921ee04ae4b66716d5a8e6ce6fe33aac333026c9b3d7
font_01_sfnt_off00010104.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10104 11068 bytes
SHA-256: 227d4f08c21f72d05d499a36a4e6ae7862dadd1d2073563daf8e293dbdba1d18

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