Malicious PDF — malware analysis report

Static analysis result for SHA-256 31e22b22c0cd5e6f…

MALICIOUS

PDF

76.4 KB Created: 2021-04-02 05:55:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: e2effaca696ad3e1f74cdd959af63e72 SHA-1: 7314ad50ba8a9f1e3965541ea93850f7c6f9eebc SHA-256: 31e22b22c0cd5e6fa08dca7d7835e526c454d6dcce4cc2c2bb7ab4aa99874566
196 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many of which are part of an SEO link farm designed to redirect users to potentially malicious sites. The heuristic 'PDF_SEO_LINK_FARM' and 'PDF_SEO_UTM_REDIRECTOR_LINK' indicate a phishing or malware distribution attempt. The embedded URLs, such as 'https://midufefew.ru/wix?keyword=tomorrowland+2020+lineup+reddit', are likely used to deliver the final payload or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://midufefew.ru/wix?keyword=tomorrowland+2020+lineup+reddit PDF link annotation
    • https://xegugunozom.weebly.com/uploads/1/3/1/4/131482992/pazogitepogarowo.pdfIn PDF document text
    • http://mofirixubutibi.getenjoyment.net/suwupazaxuvizi.pdfIn PDF document text
    • http://seluluxafej.22web.org/33178753398.pdfIn PDF document text
    • https://ruvetuse.weebly.com/uploads/1/3/4/6/134618438/najobuxinizuwudowo.pdfIn PDF document text
    • http://lobabinuladeri.medianewsonline.com/arapa_trke_kitap.pdfIn PDF document text
    • http://zutelotojenexop.getenjoyment.net/detect_text_in_image.pdfIn PDF document text
    • http://jarowulizose.sportsontheweb.net/bohemian_rhapsody_partitura_guitarra_clasica.pdfIn PDF document text
    • http://milukiwidawedej.22web.org/cesare_lombroso_o_homem_delinquente.pdfIn PDF document text
    • https://sokamokijajupi.weebly.com/uploads/1/3/5/3/135348419/wuwavoxugupaz.pdfIn PDF document text
    • https://rebopugosoge.weebly.com/uploads/1/3/5/3/135346619/posofawenulexati.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/vasofirida/auditors_report_format_for_llp.pdfIn PDF document text
    • http://xabetalofel.epizy.com/47223319359.pdfIn PDF document text
    • https://5a8aee2d-3d68-4c09-98ed-743c9c56d6fd.filesusr.com/ugd/460efe_0d781e17f9724651a7fddd115e72da0e.pdf?index=trueIn PDF document text
    • https://cf2e1f24-e5f1-4289-9567-3affce9c164e.filesusr.com/ugd/a4ea6c_b4ada4f08c0c446d8cf3b5cdc2d72c6b.pdf?index=trueIn PDF document text
    • http://jigosip.epizy.com/formal_happy_birthday_wishes_for_boss.pdfIn PDF document text
    • https://s3.amazonaws.com/vabemavuputenif/watubemogojajepetefajedip.pdfIn PDF document text
    • https://s3.amazonaws.com/jumedemimo/biometric_fingerprint_reader_driver.pdfIn PDF document text
    • https://s3.amazonaws.com/sonutopexaramuf/online_telugu_movies_app.pdfIn PDF document text
    • http://kijekamazeju.epizy.com/rojujilamuromataxiripa.pdfIn PDF document text
    • https://0778d94d-b67d-49c3-8f6f-43f52d6edec9.filesusr.com/ugd/b85eb0_89d5e838a3814e1282521c55d32717ea.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kewakuko/antabuse_davis_drug_guide.pdfIn PDF document text
    • https://7a48fde5-f9d1-4ce4-84a2-8b156d245d18.filesusr.com/ugd/8127dd_143a156b744b4cfca6fde65aa44a2a1c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vatosolikijike/hiab_lifting_plan_template_uk.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_off0000ea3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA3D 5240 bytes
SHA-256: c8518f23a8df663c49502fe5df1af6ed2d7a8beb5397cc70efc0046a9e79d812
font_01_sfnt_off0000fc02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC02 11932 bytes
SHA-256: a4b4b1856c6480945402f0d02fffc7848e3bd3d71cda39c3bcc96cfa7bca4c2a