Malicious PDF — malware analysis report

Static analysis result for SHA-256 05ee605b09b7ba4c…

MALICIOUS

PDF

69.6 KB Created: 2021-02-24 00:02:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 95f1f948ec67b5f2ddbf81368287fda6 SHA-1: 9032daf3d21f47b022e6dfd404d52640f343d8ac SHA-256: 05ee605b09b7ba4cd84dacd3251dd8e3144fda03a09f7d6ffc99905e157542e4
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs pointing to link farms and disposable hosting, a common tactic for phishing or distributing further malware. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to malicious sites, likely as part of a phishing campaign.

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://leonvi.ru/strik?utm_term=past+simple+past+continuous+online+exercises+multiple+choice PDF link annotation
    • https://cdn.sqhk.co/xiruregexibe/SjirIib/aerox_155_white_price_philippines.pdfIn PDF document text
    • https://pavenepono.weebly.com/uploads/1/3/1/3/131383439/nirexetemew.pdfIn PDF document text
    • https://cdn.sqhk.co/levowexesu/ieMighg/increase_followers_and_likes_on_instagram.pdfIn PDF document text
    • https://cdn.sqhk.co/sidogorego/h7Cjbii/3d_crystal_puzzle_castle.pdfIn PDF document text
    • https://pupadidaf.weebly.com/uploads/1/3/0/8/130873798/1168010.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465694/normal_6001c1dabd76e.pdfIn PDF document text
    • https://cdn.sqhk.co/wasefago/jbKjhii/wuserazawupunib.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489725/normal_5fe8ff2962747.pdfIn PDF document text
    • https://kozoniwapi.weebly.com/uploads/1/3/4/0/134016697/tutiguzir_tavowel_terenev.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488100/normal_5fd0670c889c5.pdfIn PDF document text
    • https://ribofefafuf.weebly.com/uploads/1/3/4/7/134770843/vexokagus.pdfIn PDF document text
    • https://cdn.sqhk.co/bapuwanuvadi/jgegghe/screen_recorder_game_recorder_pro_video_editor.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/miledu/romatovok.pdfIn PDF document text
    • http://moxilapavaz.rf.gd/58705817417.pdfIn PDF document text
    • http://bavuveba.epizy.com/anbanavan_asaradhavan_adangadhavan_movie_dialogue.pdfIn PDF document text
    • https://s3.amazonaws.com/tomamujuf/bhagavad_gita_slokas_in_sanskrit_with_english_translation.pdfIn PDF document text
    • http://zoribele.epizy.com/55352686857.pdfIn PDF document text
    • https://s3.amazonaws.com/sezewu/catwalk_jass_bajwa_song.pdfIn PDF document text
    • https://s3.amazonaws.com/kiwopusafize/insertable_tabs_template.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_off0000d29b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD29B 5240 bytes
SHA-256: 1a1b89ae6b7e10adc7474a60a7defb0dbf460330052a1986193de5c99cabc689
font_01_sfnt_off0000e444.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE444 10752 bytes
SHA-256: 274605f9bbb035334f6da0c9b95c75dab4b199e51ad1d9b0ae1a062d61c1bca7

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