Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2be0079df41a0a1…

MALICIOUS

PDF

88.5 KB Created: 2021-04-24 06:27:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 9547934d0b5deea832b87fc4439874f2 SHA-1: 562f8540f9a95b3634f407fe986ea3a93d04dd22 SHA-256: a2be0079df41a0a18271db15278e72cfb206f3e0b8331eef117c916604b25201
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://gimoguvi.ru/strik?utm_term=super+mario+land+2+dx+rom+online+game PDF link annotation
    • http://sputnews.com/wonovixobufewesbfe9.pdfIn PDF document text
    • https://cdn.sqhk.co/lituxopevuk/jfjghbq/college_football_score_top_25.pdfIn PDF document text
    • http://topsalon.xyz/questions_about_yourself_gamefrq3e.pdfIn PDF document text
    • http://visetazide.medianewsonline.com/31371045470.pdfIn PDF document text
    • https://cdn.sqhk.co/jonimaze/1pAhjoO/fireboy_and_watergirl_5_elements_play_online.pdfIn PDF document text
    • http://noxaduva.mypressonline.com/the_four_agreements_online.pdfIn PDF document text
    • https://cdn.sqhk.co/kuwusemob/Cnjdbf2/international_marketing_notes.pdfIn PDF document text
    • http://quickstore.pro/zugelajufotaxowunuvufsyant.pdfIn PDF document text
    • https://cdn.sqhk.co/baxotonad/8Bxpjjw/jakiluvawomagoxi.pdfIn PDF document text
    • http://gojevomarokabe.getenjoyment.net/metro_2033_chapter_4_trolley_combat.pdfIn PDF document text
    • https://cdn.sqhk.co/zebusukef/4GXv4ij/crash_dive_game_download.pdfIn PDF document text
    • http://dfwshootersupply.com/neverending_story_song_stranger_things_lyricsjbrzc.pdfIn PDF document text
    • http://wonder-ita.space/jibogudodidiximarowuxofurhnm1.pdfIn PDF document text
    • https://cdn.sqhk.co/tizuvuwo/hjbhhSK/pisuvusaba.pdfIn PDF document text
    • http://feelslike35.com/introduction_to_the_theory_of_computation_3rd_edition_download4egd1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fiforeru.atwebpages.com/mixefamirimaxepedene.pdfIn PDF document text
    • https://s3.amazonaws.com/kesumasaka/50968346235.pdfIn PDF document text
    • https://s3.amazonaws.com/jimugivos/gukarowozidafozo.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010858.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10858 5312 bytes
SHA-256: 369f9cded977f65b97f0dbf124178d063567fbfa0709822801c8778d00e523ea
font_01_sfnt_off00011adb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11ADB 5404 bytes
SHA-256: 8d41cfe80e60372b611becc6c8603d12ca165b5551f82fd91a4285aa5afe47b6
font_02_sfnt_off00012d26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D26 11760 bytes
SHA-256: 48ca1cc9cc1f88bd365efb79acbd619791014778b688a83e32dd2617962f9810