Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf2795ded9b23518…

MALICIOUS

PDF

80.8 KB Created: 2021-05-02 05:20:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 96aae249fe734ddfb2682363d33396ba SHA-1: 50c3062a65d7a8fa6736b5a36f2ca641dbc79f14 SHA-256: bf2795ded9b23518005a7322ed768b4a79758cf6a460f7f9324a80a8078c4948
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9997

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://maypoin.ru/strik?utm_term=is+there+nitrogen+in+dna PDF link annotation
    • http://adanakebap.org/didetedoc4u09.pdfIn PDF document text
    • http://lorozetuwivu.medianewsonline.com/endotoxinas_y_exotoxinas_bacterianas.pdfIn PDF document text
    • http://art-practice.org/bigipikedaroxavsjo8.pdfIn PDF document text
    • http://vzruvayarttraff.xyz/oneplus_nord_latest_newswkt0f.pdfIn PDF document text
    • https://tujakiko.weebly.com/uploads/1/3/0/8/130814553/zevadegenamezaz-lezadebuwevem-jukuwanotuni.pdfIn PDF document text
    • http://rinusiwujegabu.medianewsonline.com/dovixopabakejinad.pdfIn PDF document text
    • https://neruwutuwi.weebly.com/uploads/1/3/5/9/135960217/sagunalaje.pdfIn PDF document text
    • http://vas-rem.ru/96371172284nrb01.pdfIn PDF document text
    • http://sekelenogake.getenjoyment.net/computer_systems_analyst_training.pdfIn PDF document text
    • http://tadefog.medianewsonline.com/viluzapiposavepegatikepe.pdfIn PDF document text
    • http://rocketdocs.us/troy_bilt_trimmer_owners_manual8gxy0.pdfIn PDF document text
    • http://recepty-dd.info/77531466511sn62l.pdfIn PDF document text
    • https://vafebukuwu.weebly.com/uploads/1/3/1/1/131163563/8632352.pdfIn PDF document text
    • http://helpverifedbadges.com/botixihriam.pdfIn PDF document text
    • http://pixunune.sportsontheweb.net/99438240327.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fatavetotujel.onlinewebshop.net/nonavuzugukutuwolejuw.pdfIn PDF document text
    • https://s3.amazonaws.com/bulalowisu/video_creator_app_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/woxewiwupir/74809423667.pdfIn PDF document text
    • http://nafaradevofipaf.myartsonline.com/puzedo.pdfIn PDF document text
    • https://s3.amazonaws.com/mipeboro/bluedio_t3_user_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/tafogusegabomu/how_to_do_a_technical_analysis_on_stocks.pdfIn PDF document text
    • https://s3.amazonaws.com/fizup/21425737285.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fdd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDD7 4992 bytes
SHA-256: 41cce1c68544dad018a13b50149b174be9f947ffd592ab2de59a19737599043f
font_01_sfnt_off00010ec6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EC6 11044 bytes
SHA-256: 9b808c3086e994034561d9322c79555bf8dc832541ac13cd13e3e67c6c21d95d

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