Malicious PDF — malware analysis report

Static analysis result for SHA-256 f14d4149bea0c5da…

MALICIOUS

PDF

74.7 KB Created: 2021-02-19 00:14:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 7fca0f5a246c19fe7c445806b1dc02a0 SHA-1: cead8e56d4e2a405877aea531156f56392fce410 SHA-256: f14d4149bea0c5da87f90f78729ca901d277bea159c2edadc4d8b3608cb2df3e
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 0.9998

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://bologen.ru/strik?utm_term=on+the+border+menu+nutrition+information PDF link annotation
    • http://nicechange.space/photo_music_video_maker_app_downloadybdpr.pdfIn PDF document text
    • http://rocketdocs.us/tefelukumeodvqg.pdfIn PDF document text
    • http://itwomen.space/8674938350922ulb.pdfIn PDF document text
    • https://cdn.sqhk.co/posojuvapono/8aiahhh/weather_forecast_app_radar_widgets_ad_free.pdfIn PDF document text
    • https://vuvudarekiw.weebly.com/uploads/1/3/4/0/134017261/3027364.pdfIn PDF document text
    • https://lofidebonejiniz.weebly.com/uploads/1/3/5/3/135334880/jenegarimemeradegi.pdfIn PDF document text
    • https://cdn.sqhk.co/zufuxirap/Triaggp/fugasasigo.pdfIn PDF document text
    • https://cdn.sqhk.co/kadunila/ggiajnf/screen_time_app_limit_not_working.pdfIn PDF document text
    • https://wosowabo.weebly.com/uploads/1/3/4/3/134340570/5a80d300696.pdfIn PDF document text
    • http://idealica-ordina.site/tidekajudizovozivs3g1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vanumezaxibet.rf.gd/16760204851.pdfIn PDF document text
    • http://refuzopil.epizy.com/3d_video_free_for_tv.pdfIn PDF document text
    • http://doroxokile.epizy.com/video_celine_dion_power_of_love.pdfIn PDF document text
    • https://s3.amazonaws.com/davawina/12630820494.pdfIn PDF document text
    • https://s3.amazonaws.com/zesixefe/diborurufeninimivunobo.pdfIn PDF document text
    • https://s3.amazonaws.com/mejobu/video_calling_apps_free_for_android.pdfIn PDF document text
    • http://kisoperut.rf.gd/paviviruxezubod.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_off0000e7b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7B7 5104 bytes
SHA-256: 89389004cc04f11b451255a8017d078e87741e3a9001d4b32a616db6b605e728
font_01_sfnt_off0000f8e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8E1 10664 bytes
SHA-256: 63c85cf558da3d9d96a270a2f05d3659f5d72e044788745839118a0c2ae33fa4

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