Malicious PDF — malware analysis report

Static analysis result for SHA-256 406468f947e5605c…

MALICIOUS

PDF

80.4 KB Created: 2021-03-27 23:21:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: fd98caf90009f25ed3c619aeac620b18 SHA-1: e7a8a08fb2495fe4a820b62cd708061289a15a99 SHA-256: 406468f947e5605c8215e739d4ada9f8e005daf87d97787f3b0b395a3574c5cb
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are SEO-optimized and point to other PDF files, indicating a link farm or phishing infrastructure. ClamAV and ML classifiers strongly indicate maliciousness, specifically flagging it as a phishing trojan. The presence of embedded URLs and the PDF structure suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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 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.
  • 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://xajibur.ru/123?utm_term=love+inspired+suspense+submission+guidelines PDF link annotation
    • http://xovuwowim.mypressonline.com/what_is_the_half_life_of_iodine_131.pdfIn PDF document text
    • https://juwavade.weebly.com/uploads/1/3/4/5/134526694/dewunakezirofifoxupu.pdfIn PDF document text
    • https://natapoja.weebly.com/uploads/1/3/0/8/130813782/e5d804fd.pdfIn PDF document text
    • https://laximazerafa.weebly.com/uploads/1/3/4/2/134235816/b2af515e.pdfIn PDF document text
    • https://lurakowufo.weebly.com/uploads/1/3/4/4/134457973/ninesi.pdfIn PDF document text
    • https://namonivet.weebly.com/uploads/1/3/4/4/134493383/8251689.pdfIn PDF document text
    • https://laxepesijuniz.weebly.com/uploads/1/3/1/3/131383562/ccce39d34d25f.pdfIn PDF document text
    • http://bumumapa.mypressonline.com/cuales_son_los_mejores_amplificadores_de_sonido_profesional.pdfIn PDF document text
    • https://gitapizi.weebly.com/uploads/1/3/2/6/132683136/9231948.pdfIn PDF document text
    • http://xavubizuj.22web.org/free_psd_business_flyer_templates_free.pdfIn PDF document text
    • https://sekojeti.weebly.com/uploads/1/3/4/5/134583019/zunipuwu-xekagireguz-zopede-jabonekilera.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/befarekogol/dogipilisesozojeweti.pdfIn PDF document text
    • http://kopepupofi.rf.gd/52122631280.pdfIn PDF document text
    • http://dexizijisub.atwebpages.com/14522833784.pdfIn PDF document text
    • https://s3.amazonaws.com/xotomisen/music_with_cover.pdfIn PDF document text
    • https://s3.amazonaws.com/bevarolimesale/hiring_request_form_template.pdfIn PDF document text
    • http://jivikone.epizy.com/xizilutu.pdfIn PDF document text
    • http://rakikazava.rf.gd/gradable_and_strong_adjectives_exercises.pdfIn PDF document text
    • http://juwemijawikipo.epizy.com/73642428476.pdfIn PDF document text
    • https://s3.amazonaws.com/fewunadupop/atomic_bomb_facts_and_information.pdfIn PDF document text
    • https://s3.amazonaws.com/kifutizijebuj/pdf_to_word_text_editor_online.pdfIn PDF document text
    • https://s3.amazonaws.com/piwanisaj/ernest_hemingway_cat_in_the_rain.pdfIn PDF document text
    • https://s3.amazonaws.com/xonaxevetaf/zanatemenina.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_off0000f941.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF941 5208 bytes
SHA-256: 7e1ccec0fc2a5c823e1ed694d84075601fe8a86285fc25924c1f5b6ea7460fd6
font_01_sfnt_off00010ae5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AE5 11572 bytes
SHA-256: 87ce57ddf477883fa637045867d7dcf9fbc6bca8f0ce8af5fc55327773ced364

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