Malicious PDF — malware analysis report

Static analysis result for SHA-256 9412014f442c1970…

MALICIOUS

PDF

81.6 KB Created: 2021-03-17 01:49:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 97ba992d5bd314ad4a65558faaf89582 SHA-1: 239e9f11107f356d14aaff9528183ba3d9da2ed3 SHA-256: 9412014f442c19700e4b80a41b22a575fe5455a229f161a9d6d5767b62027302
186 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. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 6

  • 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.
  • 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://jumiwimov.ru/wix?keyword=the+road+back+to+me+free+pdf PDF link annotation
    • https://lurufabufukigo.weebly.com/uploads/1/3/1/4/131407807/latedufipaxajef.pdfIn PDF document text
    • http://clientesdkb.com/jumper_dress_denim_outfitym0ng.pdfIn PDF document text
    • https://gimituwemowi.weebly.com/uploads/1/3/4/8/134872285/3589349.pdfIn PDF document text
    • https://litodamun.weebly.com/uploads/1/3/4/7/134710511/vefejorixatazab.pdfIn PDF document text
    • http://detozube.scienceontheweb.net/introduction_to_fourier_analysis_morrison.pdfIn PDF document text
    • https://xewixubigikuj.weebly.com/uploads/1/3/4/8/134892453/jexuneluzajige.pdfIn PDF document text
    • http://bellissimo.online/7737006277963onl.pdfIn PDF document text
    • http://topplafond.xyz/el_lenguaje_del_cuerpo28vpl.pdfIn PDF document text
    • https://tonawonigavima.weebly.com/uploads/1/3/5/3/135345065/7158607.pdfIn PDF document text
    • https://ramageputa.weebly.com/uploads/1/3/1/6/131637054/sakujuvigipagogupulo.pdfIn PDF document text
    • https://komamezumef.weebly.com/uploads/1/3/1/3/131398541/padujavapexulije.pdfIn PDF document text
    • http://am-sound.ru/bexakabukojasitesirbbmsk.pdfIn PDF document text
    • https://butusokusumowa.weebly.com/uploads/1/3/5/2/135294155/2e79a.pdfIn PDF document text
    • https://falatunasozenu.weebly.com/uploads/1/3/4/7/134762474/4494382.pdfIn PDF document text
    • http://differencecheats.net/street_fighter_3_android9l6mx.pdfIn PDF document text
    • http://vegoletox.medianewsonline.com/87138512104.pdfIn PDF document text
    • https://negozikazaseju.weebly.com/uploads/1/3/4/5/134587396/7d2e969f.pdfIn PDF document text
    • http://vijexibat.mywebcommunity.org/44258924584.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://f815f12b-539f-4060-8ed9-abd2caada31b.filesusr.com/ugd/ceb2e8_97cfd2bf55034754a5d7a7acd0403093.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xisefowu/akira_movie_all_songs_free.pdfIn PDF document text
    • http://nibizuladode.onlinewebshop.net/building_construction_principles_materials_systems_2nd_edition_free.pdfIn PDF document text
    • https://s3.amazonaws.com/jevelel/sefijalakemuwafij.pdfIn PDF document text
    • https://90ff81fc-98d9-4e53-96a3-aaa5c1c2042e.filesusr.com/ugd/bb5aff_953493640710436da31d605680ca6628.pdf?index=trueIn PDF document text
    • http://gakamaxoluzes.atwebpages.com/the_umbrella_academy_comic_espaol_descargar_gratis.pdfIn PDF document text
    • https://e6b56e3c-1b88-4cfb-972d-ab1702b0a06e.filesusr.com/ugd/8c0e65_9938ebab2a484763be4246b817d0d6ad.pdf?index=trueIn 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_off0000f09c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF09C 4972 bytes
SHA-256: 97ec84f9a5cb8e05a35e46edceeb6590a8263ea86fbd69d9f4a7e8baf92df0ed
font_01_sfnt_off00010180.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10180 11456 bytes
SHA-256: 36d8e3d32d92d3d86b44d9be854fa6735132ff748d9ca1a57a2566eb354935f9
font_02_sfnt_off0001289e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1289E 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176