Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0a54438f038e5a1…

MALICIOUS

PDF

82.0 KB Created: 2021-03-01 19:40:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 6c1a9da84e9e5f1f72ab4cfd707447e2 SHA-1: 805836662812e6c4f6d3336aeb33b29b616a3a9d SHA-256: e0a54438f038e5a152d6b4fb9c8781003ec253b1778866c89b4b6dfe3111b346
126 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many of which point to disposable domains and are flagged as link farms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or a scam. While no scripts were explicitly extracted, the presence of numerous external links suggests an attempt to redirect the user to malicious content or a phishing page.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://vilenefex.ru/wix?keyword=worksheet+ecological+relationship PDF link annotation
    • https://cdn.sqhk.co/jefapukawore/tEVoieI/free_code_text_editor_mac.pdfIn PDF document text
    • http://xufisuraber.22web.org/to_use_in_japanese_te_form.pdfIn PDF document text
    • https://nogenovone.weebly.com/uploads/1/3/4/7/134745979/453954.pdfIn PDF document text
    • https://sexewowoko.weebly.com/uploads/1/3/0/8/130873923/zogelivexifarewe.pdfIn PDF document text
    • http://wijasagasipode.getenjoyment.net/nesevibimoverogoduxi.pdfIn PDF document text
    • http://pofaduxiruk.getenjoyment.net/robin_hood_movie_2018_actors.pdfIn PDF document text
    • http://mitipuwade.22web.org/did_harry_potter_cast_get_along.pdfIn PDF document text
    • https://cdn.sqhk.co/rizijuwet/gjjghb6/micro_pigs_texas.pdfIn PDF document text
    • http://pusewuvi.medianewsonline.com/4._what_are_the_different_abbreviations_for_the_different_measurements.pdfIn PDF document text
    • https://cdn.sqhk.co/jekunesoru/hfO4Dgd/sweet_polly_oliver_sheet_music.pdfIn PDF document text
    • https://cdn.sqhk.co/sisadenev/srGYjb7/bisod.pdfIn PDF document text
    • http://dosaxixapaxa.medianewsonline.com/nogozixosowena.pdfIn PDF document text
    • https://fowerorizer.weebly.com/uploads/1/3/1/8/131856705/09ce6156.pdfIn PDF document text
    • https://navubuxodogonid.weebly.com/uploads/1/3/5/3/135327143/kevapora_lesovitulisirix.pdfIn PDF document text
    • https://cdn.sqhk.co/remezebona/hihhgin/house_party_2_music_soundtrack.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gufaxepelirub.rf.gd/jetipegedumanaliloxujeb.pdfIn PDF document text
    • http://tituxotal.epizy.com/gusofa.pdfIn PDF document text
    • http://suraweko.epizy.com/excel_vba_search_all_sheets.pdfIn PDF document text
    • http://jenesigafepi.epizy.com/98607480235.pdfIn PDF document text
    • http://kurejaj.epizy.com/sijiwadizimimezufenorite.pdfIn PDF document text
    • http://mevomum.epizy.com/calm_relaxing_music_free_s.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001043d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1043D 5272 bytes
SHA-256: dfa217ef1a136ad836db0e73c33860d66714304f34e712875549ee9ec95cc852
font_01_sfnt_off0001163c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1163C 10636 bytes
SHA-256: ca2a389f028d67610c2efea74b7b8f532c2623f9dfd3c4ea55763989f11f7fc7

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