Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8516f99af574c12…

MALICIOUS

PDF

79.0 KB Created: 2021-03-28 08:50:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: fc306cd01fdfd6b3f92e8cd2e9423590 SHA-1: 9809f34961df513d2224ed1dab0f10b098549c98 SHA-256: e8516f99af574c12340a109f192e91e95787342ce9de94cb5b17dda0ee32fb39
134 Risk Score

Malware Insights

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

This PDF document was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The presence of numerous external URIs and the 'SE_INVOICE_LURE' heuristic suggest a phishing attempt, likely to trick the user into downloading a malicious payload or visiting a compromised site. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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/award?keyword=asset+turnover+ratio+pdf PDF link annotation
    • https://cdn.sqhk.co/jutafegobexe/pTpR2jc/birthday_wishes_pictures_free.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426957/normal_603928ed120ea.pdfIn PDF document text
    • http://kersita.space/i.n._herstein_abstract_algebra_solutionsj1skk.pdfIn PDF document text
    • http://sevagawos.getenjoyment.net/what_type_of_coconut_oil_is_best_for_cradle_cap.pdfIn PDF document text
    • https://cdn.sqhk.co/xeposetuge/jihcJhi/vitalsource_technologies_limited.pdfIn PDF document text
    • https://cdn.sqhk.co/visevunu/gi0idgp/5963049802.pdfIn PDF document text
    • http://dutarotanazosuv.medianewsonline.com/94678470011.pdfIn PDF document text
    • https://cdn.sqhk.co/wixefawoz/ggfjdtt/61043062502.pdfIn PDF document text
    • https://cdn.sqhk.co/vilitemeru/4djbhoU/machine_gun_preacher_documentary_watch_online.pdfIn PDF document text
    • http://my-favshope.online/adobe_photoshop_cs5_free_full_version1dx6p.pdfIn PDF document text
    • http://mitutepoka.medianewsonline.com/which_is_more_important_sun_moon_or_rising_sign.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495246/normal_5fc5e7c787a6f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415756/normal_5fcfa6abe95a5.pdfIn PDF document text
    • http://ryukzak.digital/is_free_will_and_determinism_compatible19ogo.pdfIn PDF document text
    • https://cdn.sqhk.co/luwesefizi/2gihKNP/smilodon_rampage_game.pdfIn PDF document text
    • https://cdn.sqhk.co/nulogoxeja/njhKwLw/fegolelexix.pdfIn PDF document text
    • http://walletelectrum.buzz/wikipedia_madame_gao4uuzr.pdfIn PDF document text
    • http://gosunenibunale.getenjoyment.net/taxujawux.pdfIn PDF document text
    • http://priz24.site/74914398850lis8o.pdfIn PDF document text
    • https://cdn.sqhk.co/tamireto/5wdWLja/zagowunaj.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
    • 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_off0000e828.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE828 4936 bytes
SHA-256: 93e0b78530bd091d56f9825f95418ecaed0d72415f736bf343f144b63f28f85e
font_01_sfnt_off0000f8fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8FE 11680 bytes
SHA-256: a9d35072e5438184006bb1672b15ed11be5b32bd11c145a5ec8511b401d4312a
font_02_sfnt_off000120ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120EA 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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