Malicious PDF — malware analysis report

Static analysis result for SHA-256 dde8956eaba28438…

MALICIOUS

PDF

85.8 KB Created: 2021-03-24 14:15:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: eb993acb24becc8f6c94493ae2d206fc SHA-1: ccd340c609a2af32f2ab31b6ccedfa937d639260 SHA-256: dde8956eaba28438af7fed2443ca642639d1b950a9d7bdc3dd02de80db917a52
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains a large number of external links, many hosted on disposable domains, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. The presence of external URIs and a link farm points towards an attempt to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • 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://ponafet.ru/strik?utm_term=viper+5305v+installation+manual PDF link annotation
    • http://bitipusefotas.66ghz.com/blouse_designs_photos_new.pdfIn PDF document text
    • http://hookup682.site/695773193723vmyg.pdfIn PDF document text
    • http://nicechange.space/house_md_season_4_episode_guide0gr7z.pdfIn PDF document text
    • https://vinofuloro.weebly.com/uploads/1/3/4/8/134850824/3edc77bf.pdfIn PDF document text
    • https://dasajusowerav.weebly.com/uploads/1/3/1/6/131637273/xapumenufuzuran-kokotuxiv.pdfIn PDF document text
    • https://cdn.sqhk.co/gafisasiwu/ggd4icN/class_9th_maths_ncert_solutions_chapter_12._1.pdfIn PDF document text
    • https://cdn.sqhk.co/vimewiki/hbjd1WA/vizarogitafonefisunakogu.pdfIn PDF document text
    • http://hellesypakk.online/gorowixe86h9j.pdfIn PDF document text
    • https://cdn.sqhk.co/kavuzoda/GpgjjbB/venta_arcade_dragons_lair.pdfIn PDF document text
    • https://dosijikapok.weebly.com/uploads/1/3/2/6/132682778/4e9ff491c7e664f.pdfIn PDF document text
    • https://cdn.sqhk.co/retagigimusa/0jdgEie/zupagetufipuzonobupem.pdfIn PDF document text
    • https://cdn.sqhk.co/soziwariru/gjgT7jc/futsal_championship_2020_street_soccer_league_standings.pdfIn PDF document text
    • https://wuwogijate.weebly.com/uploads/1/3/4/8/134886767/24093b17b3ec8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://womopemi.epizy.com/android_telefon_klingeln_lassen.pdfIn PDF document text
    • http://kuporalegumema.epizy.com/12112615495.pdfIn PDF document text
    • https://1cd0d4d5-11d4-440c-a307-81f73801f601.filesusr.com/ugd/f0e51d_7bd3c85748ae46a6a5eaf8f2b71da6ee.pdf?index=trueIn PDF document text
    • https://9afb1793-bc57-4514-bb46-74e980466609.filesusr.com/ugd/11f207_faf77ca855f24697b8b5a46404b02abd.pdf?index=trueIn PDF document text
    • http://zavujosabojid.rf.gd/wifuxuligovu.pdfIn PDF document text
    • https://da6a6a96-7907-4aac-bfe3-592928b14ca9.filesusr.com/ugd/39e844_06c542a420cd4af5887b046255136b84.pdf?index=trueIn PDF document text
    • http://xipipowateselok.epizy.com/ambasamuthiram_ambani_songs_isaimini.pdfIn PDF document text
    • https://315736c7-1030-4200-8d24-05c9f4951019.filesusr.com/ugd/d19ca0_b2676ca2da004ff7a24ede3eadc7b8b0.pdf?index=trueIn 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_off00010d9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D9C 5420 bytes
SHA-256: d8420e7a972a40099d38f1f518aad1f063361ad9b8613baacf87dfdf60f33549
font_01_sfnt_off00012003.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12003 12464 bytes
SHA-256: 2b17b9ceabb39e002ff8bb6c827decbb9caf3ea0992026428f72ec180bfa426e

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