Malicious PDF — malware analysis report

Static analysis result for SHA-256 544ebfe15c369f51…

MALICIOUS

PDF

78.6 KB Created: 2021-02-28 08:23:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 183dac21f61f3768646d39c19924ecec SHA-1: dcb8f883beda25f29b72bbed752ec65b8552681c SHA-256: 544ebfe15c369f510519c55d29214719cbbeaab01b25ac55adeaa5a75eb448e5
136 Risk Score

Malware Insights

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

The sample is a PDF document flagged by ClamAV as a phishing trojan. Heuristics indicate it uses an SEO redirector to lure users with a fake product specification link. The embedded URL `https://dugedepap.ru/wix?keyword=asus+vs247h-p+specs` is the primary indicator of this phishing lure. No scripts were extracted, but the PDF structure and URL suggest a phishing attempt to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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://dugedepap.ru/wix?keyword=asus+vs247h-p+specs PDF link annotation
    • http://vezerfa.xyz/ashrae_62._2_2013_freek3e5b.pdfIn PDF document text
    • http://frontend-developer-azaynullin.site/dj_spart_competition_horn_downloadgbek0.pdfIn PDF document text
    • http://dororuminaxa.mywebcommunity.org/in_what_order_were_the_harry_potter_books_published.pdfIn PDF document text
    • http://fevinoreniwelik.sportsontheweb.net/funivo.pdfIn PDF document text
    • http://vadusulu.iblogger.org/set_background_color_android_view.pdfIn PDF document text
    • http://bosemefawixuwov.mypressonline.com/depuxexizokofalilolusomon.pdfIn PDF document text
    • http://zawuruliwisevo.iblogger.org/kobike.pdfIn PDF document text
    • http://igcopyrightverify.com/clash_of_clans_cheats_gems5hws1.pdfIn PDF document text
    • http://voicebftyi.com/ates_ve_su_2_kisilik_oyunlar_1zylk6.pdfIn PDF document text
    • http://plusstore.pro/new_rangers_apprentice_book44diz.pdfIn PDF document text
    • http://zugapuvu.mywebcommunity.org/56397290157.pdfIn PDF document text
    • http://shoop-fk.ru/super_snake_cobrazddju.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/biwubeleba/sonipobonekamevemibixefop.pdfIn PDF document text
    • https://s3.amazonaws.com/xisakazelelinim/movies_jatt_bollywood_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/faxaxos/tesenonuxolaxunodosasazej.pdfIn PDF document text
    • https://s3.amazonaws.com/lomuper/brochure_templates_online_free.pdfIn PDF document text
    • http://xepesigatijidix.rf.gd/28604820112.pdfIn PDF document text
    • https://s3.amazonaws.com/zasepo/anomaly_warzone_earth_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/xupovobejanam/what_should_i_not_eat_on_a_gluten_free_diet.pdfIn PDF document text
    • https://s3.amazonaws.com/nunakixuma/bhaktha_prahlada_telugu_movie_free.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d637.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD637 3028 bytes
SHA-256: 1344297ac3eee8681cffc03e9d761b2735618db301dc60d380d883d09a86db30
font_01_sfnt_off0000e0fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0FE 5064 bytes
SHA-256: 29911071181f296af075ed44f5bf85ddec5bc1d921d2444bd61a648774934bc6
font_02_sfnt_off0000f260.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF260 10840 bytes
SHA-256: e9bc786a57a4ec154a5d6534df4968ffe50f9bbb8fceddec535c736b0edd4288
font_03_sfnt_off00011730.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11730 16208 bytes
SHA-256: 9234be74d189993537ae7515485c43d6d600ca0afec584b4163d10cb88f273dd

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