Malicious PDF — malware analysis report

Static analysis result for SHA-256 beaf3e2e875b6cc7…

MALICIOUS

PDF

73.6 KB Created: 2021-02-19 15:13:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 3002cb344199d6ed9d1c3e99e0a8e636 SHA-1: d2c796564813e854439f0b4593e912b972e8971b SHA-256: beaf3e2e875b6cc715aa2ff0e396a33cf0fb49ffb26c4c221bc2118dcb18aaa8
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous URLs, many of which are hosted on disposable domains and appear to be part of a link farm designed to redirect users. The document body, though heavily obfuscated, suggests a lure related to college recommendations, likely intended to trick users into clicking a malicious link. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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 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://druttle.ru/123?utm_term=how+to+get+a+letter+of+recommendation+for+college PDF link annotation
    • http://sovuxofi.66ghz.com/dupotedesotixovuxubufutu.pdfIn PDF document text
    • http://brumbum2.xyz/68528316734y4t8t.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417992/normal_5fe76cc3b1f59.pdfIn PDF document text
    • https://cdn.sqhk.co/bibobovezave/giEtKc0/buzzer_beater_sound_effect_mp3_download.pdfIn PDF document text
    • http://lojasamericanasbr.com/1415970065kl1te.pdfIn PDF document text
    • http://olymptrade.buzz/departamentos_del_peru_con_sus_capitales3i7w6.pdfIn PDF document text
    • https://cdn.sqhk.co/lopumilekana/MjihMig/vh1_live_stream_123.pdfIn PDF document text
    • http://my-favshop.online/plato_allegory_of_the_cave_50_essays4dmv1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450139/normal_6021280248ffb.pdfIn PDF document text
    • https://cdn.sqhk.co/wekaradukuve/EjcMOgc/super_jabber_jump_mod_apk_unlimited_money.pdfIn PDF document text
    • https://cdn.sqhk.co/tumowara/MiZidrk/color_block_cardigan_plus.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366043/normal_600f87b0b9467.pdfIn PDF document text
    • https://cdn.sqhk.co/ruzixije/xibhdmr/95423621231.pdfIn PDF document text
    • http://kinokaiff.space/237558259672dffe.pdfIn PDF document text
    • http://bred-enligne.com/66514026279bhm9d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383699/normal_6001ce1adac36.pdfIn PDF document text
    • http://uscreditreport.info/fejiduvifuxobimakananerfxdgr.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/datarofapakil/remedial_action_plan_template_nhs.pdfIn PDF document text
    • https://s3.amazonaws.com/jeworurowam/championship_manager_2018_unlimited_money.pdfIn PDF document text
    • https://s3.amazonaws.com/tirimofufemukat/wozipidigunugipakelugupo.pdfIn PDF document text
    • http://bafimilatape.epizy.com/dodobobi.pdfIn PDF document text
    • http://vibesegajepo.epizy.com/feed_the_beast_infinity_evolved_skyblock_guide.pdfIn PDF document text
    • http://vuduluxepo.epizy.com/c_compiler_for_mac.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_off0000e1e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1E9 5216 bytes
SHA-256: 30f47ed59a50f2e4b9a2303f7964311023c4222f5c8f6d1bcb954744af19e2c7
font_01_sfnt_off0000f3a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3A8 11464 bytes
SHA-256: bc12350a2207fc96d60dc3e6ab77efaf920a18519c50302379fc7254cabba9db

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