Malicious PDF — malware analysis report

Static analysis result for SHA-256 e09745e3c1611c4d…

MALICIOUS

PDF

75.0 KB Created: 2021-04-07 03:07:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 02e7c18e8f465c717b24c39caf4f2dbf SHA-1: 9d83c538922b77fa2049890d1265c9d5ba850656 SHA-256: e09745e3c1611c4da27889ca9534687f6a7ef6d840ad2d765e6f5817a372caf4
194 Risk Score

Malware Insights

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

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 and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 7

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://kuzutuzo.ru/wix?keyword=google+drive+home+alone PDF link annotation
    • http://nnorm-id.com/can_a_2016_chevy_traverse_tow_a_camperrlmgo.pdfIn PDF document text
    • https://koxewezadopu.weebly.com/uploads/1/3/4/0/134017906/46ee2b99c0.pdfIn PDF document text
    • http://leadtop.co/780597212429i606.pdfIn PDF document text
    • https://cdn.sqhk.co/palugalanivo/fgcF67I/ant_chrome_video_er.pdfIn PDF document text
    • https://devumevone.weebly.com/uploads/1/3/4/5/134589636/3321185.pdfIn PDF document text
    • https://gefumugizifoz.weebly.com/uploads/1/3/0/7/130739155/de4da80a7915be.pdfIn PDF document text
    • https://cdn.sqhk.co/jutepoxof/MWgexhj/la_redoute_furniture_review.pdfIn PDF document text
    • https://kimidevi.weebly.com/uploads/1/3/4/0/134018720/nesazawomukaxo-tiwoda-kanew-kenetonefinenaw.pdfIn PDF document text
    • http://steblin.pro/pdf_to_dwg_converter_onlinem073o.pdfIn PDF document text
    • http://arm-watch3.club/funuvijugesuzamazurekaxihyl8.pdfIn PDF document text
    • https://cdn.sqhk.co/putizimetiwe/dVDOhip/never_gonna_stop_now_lyrics.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/woxorojero/bodisetuvorafagefirobe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/664e1d73-a936-4156-9183-58333eade89b/how_to_start_onan_5500_generator.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7cbbdc14-f0e3-4145-b2d9-bb88d2fd3fce/behringer_x32_main_output_eq.pdfIn PDF document text
    • https://d7b50aa0-fea3-4edc-ba9e-4ed0094b0c60.filesusr.com/ugd/7f614e_bbffa78fe67340e6b31b8870ee769993.pdf?index=trueIn PDF document text
    • https://60f6da8c-824c-4163-aae9-6195f2ac7ed4.filesusr.com/ugd/7f16bd_77109507da964db6bcc1093b1f25856e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee603322-0f9d-495d-9df6-493fdc7ea7d9/how_to_determine_the_composition_of_a_rock.pdfIn PDF document text
    • https://s3.amazonaws.com/ladojenefe/35598448588.pdfIn PDF document text
    • https://ffb80149-315c-4936-8637-e87477b606fc.filesusr.com/ugd/e7410d_cc675095dc394a58a5b5f3edf4fb3e3d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vesubodufisi/logarithm_practice_worksheet.pdfIn PDF document text
    • https://6ada6c45-9e8d-4063-9633-40b9e375d9b0.filesusr.com/ugd/9a7afa_4841cd6a6b614d759e6570b4e7a2e5ee.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/db73065e-2f3b-4290-a1d1-905980f7c8ad/55059748651.pdfIn PDF document text
    • https://5c71d6b4-13b5-43a2-97a4-9a0eba4d0f4d.filesusr.com/ugd/0f1814_129920b2fb7c4fbbaab14f0700dd26db.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zesotat/helping_verbs_in_english_grammar.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_off0000e929.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE929 5152 bytes
SHA-256: 46aaf7a8c1c47e596e9c7be0db5335328265fef9022f8cecca29cb874859711f
font_01_sfnt_off0000fa89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA89 10584 bytes
SHA-256: 95e13b27ba1d1d3b9a18d6aff4563a4e0cc9e4eba697137e54b7ac1115f724ea