Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea740bb5f2c0ea1b…

MALICIOUS

PDF

75.6 KB Created: 2021-03-21 01:44:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 7a7824224696872bdb1ecc37ac13348d SHA-1: dfa560a304ed7de0aa5812aeeebf10871f08795c SHA-256: ea740bb5f2c0ea1bc92a3921dd373c2dfbb44c2a0fb5a81aa7ef47ce5f6f5105
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains and link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of techniques used to redirect users to malicious sites, likely for credential harvesting or further payload delivery.

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://druttle.ru/award?keyword=abc+worksheets+for+kindergarten+printables+pdf PDF link annotation
    • https://cdn.sqhk.co/kinibemazoz/Wjh7hsN/marojexefe.pdfIn PDF document text
    • http://rivokalodusi.sportsontheweb.net/amazing_grace_sheet_music_f_major.pdfIn PDF document text
    • https://mijutadozas.weebly.com/uploads/1/3/4/5/134590660/tovefu_kigoga_webodif_dudip.pdfIn PDF document text
    • http://fibiver.mygamesonline.org/depuy_attune_knee_surgical_technique.pdfIn PDF document text
    • https://zoparojo.weebly.com/uploads/1/3/4/7/134762662/xidozup.pdfIn PDF document text
    • https://cdn.sqhk.co/lebudawojafi/ghcYYha/xudozozidonip.pdfIn PDF document text
    • https://fanonobumoxevo.weebly.com/uploads/1/3/1/3/131384335/471354fe0e.pdfIn PDF document text
    • https://cdn.sqhk.co/xidizizo/UZXn2jh/taduratigukipupa.pdfIn PDF document text
    • http://raxewaponoxiv.mygamesonline.org/alfreds_basic_piano_library_theory_book_level_1a_answers.pdfIn PDF document text
    • https://mefirotevi.weebly.com/uploads/1/3/5/3/135314773/6179204.pdfIn PDF document text
    • https://cdn.sqhk.co/minofavazu/dAijjg9/depotelafunurusimosilovun.pdfIn PDF document text
    • https://cdn.sqhk.co/tilomulobet/gfdJjcJ/duzolexajasusexe.pdfIn PDF document text
    • http://zobotalemogi.sportsontheweb.net/what_is_the_most_viewed_rock_song_on_youtube.pdfIn PDF document text
    • https://vudulami.weebly.com/uploads/1/3/5/9/135964857/31bbc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sajurewe.rf.gd/a._p_and_g._p_formula.pdfIn PDF document text
    • http://mirokuf.rf.gd/jonasakorumabinunilixige.pdfIn PDF document text
    • http://jokosen.atwebpages.com/xixafanixe.pdfIn PDF document text
    • http://kafakakuwif.rf.gd/is_star_citizen_pay_to_play.pdfIn PDF document text
    • http://gajerur.epizy.com/bhagavatam_slokas_in_tamil.pdfIn PDF document text
    • http://govuwetubor.epizy.com/wituritaduvul.pdfIn PDF document text
    • http://jokosen.atwebpages.com/red_cards_in_joking_hazard.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_off0000e667.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE667 5700 bytes
SHA-256: c4b7ea0cb6c212d9d400144876fda2b5f58ff079093aa84a689fb159660bebfe
font_01_sfnt_off0000f9de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9DE 10840 bytes
SHA-256: 844efdaa528c7e7c1916ba1d7206700c009fc64a70d1ea61c5abbb426c66c2e2

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