Malicious PDF — malware analysis report

Static analysis result for SHA-256 0276302d809c246f…

MALICIOUS

PDF

68.1 KB Created: 2021-03-11 19:58:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 057a0a70b8425abbcd79029e56b15bb7 SHA-1: 93b65b0eae368962b578149d27e4de50959b1548 SHA-256: 0276302d809c246f6b8772fba023f588742102089af47dba253090ed55de8386
104 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by 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 0.9998

Heuristics 5

  • 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.
  • 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://crophysi.ru/award?keyword=best+pdf+to+word+ocr+converter+online PDF link annotation
    • https://retariluwefise.weebly.com/uploads/1/3/4/8/134858211/fariw-jabomudivileze-virilota-tadovewasi.pdfIn PDF document text
    • http://obzorov.site/how_to_facilitate_a_group_discussion05olo.pdfIn PDF document text
    • http://zalofamanaw.22web.org/new_odia_bhajana_song.pdfIn PDF document text
    • https://tilavulam.weebly.com/uploads/1/3/0/7/130739056/2f0d5ad8c4.pdfIn PDF document text
    • http://libertinemodels.com/firefly_2016_posterjzhpy.pdfIn PDF document text
    • http://lenulari.mypressonline.com/pdf_marketing_management_kotler_15th_edition.pdfIn PDF document text
    • http://bamefidev.mygamesonline.org/10717480669.pdfIn PDF document text
    • http://gedadekenoz.mywebcommunity.org/65390647798.pdfIn PDF document text
    • http://sreview.online/11873305826vh9mv.pdfIn PDF document text
    • http://hugertely.xyz/kawozebok23z.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/jipowumat/vlc_media_player_for_ubuntu_14._04.pdfIn PDF document text
    • https://e192e36c-395d-4660-9df6-aa7aed00c30a.filesusr.com/ugd/3aee12_b4401b7fd89d484295b3c5b940f06add.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tanapilamaxi/how_to_program_a_sony_rmt-d197a_remote.pdfIn PDF document text
    • https://1c985592-4fe2-425a-b8d2-7dc24782370c.filesusr.com/ugd/a13bc2_9155cf0abc5644a6a97b9b8f20e9fc41.pdf?index=trueIn PDF document text
    • https://03a45e23-20c9-4b13-8d21-50c2609e56df.filesusr.com/ugd/502f3d_60a5c9e3f9ab4b6aad37c47e218fa987.pdf?index=trueIn PDF document text
    • http://gotozowixefe.epizy.com/how_do_i_identify_my_ez_go_golf_cart.pdfIn PDF document text
    • https://s3.amazonaws.com/dorobukasawituw/regij.pdfIn PDF document text
    • https://s3.amazonaws.com/kasuwevovog/vinpro_cost_guide_2018.pdfIn PDF document text
    • https://f9c81679-ddb1-4746-ab40-32673edc426c.filesusr.com/ugd/2eff39_9c4f1fcd8aa64a1787e564230a2475df.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/rizezobabub/24211172214.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_off0000cdbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDBD 5140 bytes
SHA-256: b99847bb7d5821f6beca3b4c51b778c89b39efd7aff51fe437eeb09f4833b6d2
font_01_sfnt_off0000df6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF6A 10344 bytes
SHA-256: efbaf18270ed05ea48e21b0042f962972f0a70129a33911fe74e0bb6c717bb48

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