Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c1e366bf253ab8d…

MALICIOUS

PDF

79.9 KB Created: 2021-03-26 07:02:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 39e81c68aa23742222871943392ef09f SHA-1: b042d206755a2ebcf6ce905dace620268459752b SHA-256: 4c1e366bf253ab8d9aa77ba54dffb96540e8049feaf2e9168cb65dbd60e86166
136 Risk Score

Malware Insights

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

The PDF contains heuristics indicating it's a phishing lure, specifically using an image to redirect users to a malicious URL. The ML classifier and ClamAV detection strongly support its malicious nature. The embedded URL, https://bologen.ru/wix?keyword=sawyer+hartman+joey+graceffa, is the primary indicator of compromise, likely leading to a phishing or malware download site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

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://bologen.ru/wix?keyword=sawyer+hartman+joey+graceffa PDF link annotation
    • http://koparikamoze.scienceontheweb.net/biology_igcse_z_notes.pdfIn PDF document text
    • http://foramodosug.mygamesonline.org/75717279312.pdfIn PDF document text
    • http://feludekinopotas.scienceontheweb.net/48710701194.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456379/normal_5fdb27faaeef6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382972/normal_6034efaf6e5aa.pdfIn PDF document text
    • http://mirijesuwakug.sportsontheweb.net/82986012993.pdfIn PDF document text
    • http://mevukavotidu.getenjoyment.net/how_do_i_fix_a_dish_hard_drive_failure.pdfIn PDF document text
    • http://poxumanavofeboz.scienceontheweb.net/advanced_mathematical_concepts_precalculus.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424981/normal_60214f3ccd5fb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376371/normal_600fa862c2e8e.pdfIn PDF document text
    • http://dewisazovuvoxi.mywebcommunity.org/living_in_harmony_with_nature_definition.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4492240/normal_6004b4635ee99.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
    • https://s3.amazonaws.com/zeworibuzoza/vamojetomed.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5214fa76-ac05-4309-bb5a-c8262496da93/setuj.pdfIn PDF document text
    • https://s3.amazonaws.com/supefujoxopubu/2010_chevy_impala_repair_manual_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d20757c2-df03-4a24-920d-ffff4ce4aeff/printer_is_offline_hp_envy_5000.pdfIn PDF document text
    • https://s3.amazonaws.com/wifukedot/kewup.pdfIn PDF document text
    • http://futebowa.atwebpages.com/derivative_rules_and_formulas.pdfIn PDF document text
    • https://s3.amazonaws.com/votuweroxigezog/7001791287.pdfIn PDF document text
    • http://fataragoreb.myartsonline.com/venogomowibapativi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f5d34f4e-5993-466f-ae0c-3671ae101681/labour_law_textbooks.pdfIn PDF document text
    • https://s3.amazonaws.com/tizowodifi/loxonavejuk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc4bffa1-e928-4d08-8fa3-c8344350fadd/bufapukixipimokoxevavi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/39ed1fcf-ac43-4609-a48b-ea8063506d76/kumiganodidenitile.pdfIn PDF document text
    • http://viniwowosur.onlinewebshop.net/fundamentals_of_chess.pdfIn PDF document text
    • https://s3.amazonaws.com/nevovumowa/1363191672.pdfIn PDF document text
    • https://s3.amazonaws.com/pujirageg/jesus_messiah_chords_gaither_vocal_band.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC4E 5196 bytes
SHA-256: 45daf8e205d17150a0e7faf4e66161d6fbb5dd5b3ce484ed2077eca299eaf214
font_01_sfnt_off0000fde9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDE9 10652 bytes
SHA-256: 7b0dedbe0089673e38c8eb5292850c31fb7abf94a0eef081ad14f639060e6b00
font_02_sfnt_off00012231.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12231 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3