Malicious PDF — malware analysis report

Static analysis result for SHA-256 75a8be965e28ce74…

MALICIOUS

PDF

85.0 KB Created: 2021-02-26 19:15:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 1734ee02b477cb33c76b0a8de33b2749 SHA-1: 3f8462876db0dc6ebacb3335551248c028690caf SHA-256: 75a8be965e28ce744c4411858f37b2b423310ab9f0379d1ea823921262d4af67
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://fokemale.ru/strik?utm_term=can+you+just+walk+into+a+army+recruiting+office PDF link annotation
    • http://fruits-summer.fun/99809050162lhywf.pdfIn PDF document text
    • http://blog-millionaire.buzz/streets_of_rage_4_ps4_cheat_codespw4rn.pdfIn PDF document text
    • http://romeital.space/retizetafusetagarokoms02c6.pdfIn PDF document text
    • https://revevapeseguv.weebly.com/uploads/1/3/5/3/135387876/rikojudop_befaposozikob.pdfIn PDF document text
    • http://lazerepil.site/fupobefozusaninivqu70x.pdfIn PDF document text
    • https://nisudine.weebly.com/uploads/1/3/1/4/131454656/46dc42f5f.pdfIn PDF document text
    • http://zzzmmmmejjj.space/film_indirme_sitesi_nerilv6w2.pdfIn PDF document text
    • http://sayfelengs.space/absence_procedure_templatezqz4p.pdfIn PDF document text
    • http://de-bewertung-889562.icu/sosyal_bilimlerde_aratrma_yntemleri_af_ckm_sorularoyru3.pdfIn PDF document text
    • http://parralax.net/pagusanucjaqp.pdfIn PDF document text
    • http://arendaavto.taxi/trapped_in_the_forest_free_downloadx47ek.pdfIn PDF document text
    • http://chategratis.online/act_math_practice_test_2020h8riz.pdfIn PDF document text
    • https://dofikusoru.weebly.com/uploads/1/3/4/4/134472045/bonadimuzuxe-rixajoludigeb-duzupupejawibu.pdfIn PDF document text
    • http://tublitalia.fun/reflection_mulan_violin_sheet_musicb71gb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/xakajoziwibi/leladezatapujod.pdfIn PDF document text
    • https://s3.amazonaws.com/petuzutemixuvod/aatish_ost_video_song.pdfIn PDF document text
    • https://s3.amazonaws.com/ximupuv/linux_centos_commands_cheat_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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010079.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10079 5440 bytes
SHA-256: 214a87824013de197922b3458774e874b3d8fbe25dad0c816e5a336cde48406e
font_01_sfnt_off00011311.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11311 11084 bytes
SHA-256: f9176f4d97649f42b8e2cdbc22d8d0bddfe26e7724a4cccc3f46b6dcc8096831
font_02_sfnt_off00013820.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13820 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c