Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3b0b18dc2cb0d45…

MALICIOUS

PDF

160.9 KB Created: 2021-04-06 16:35:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 695589824d201cda0d9b684c097d90b1 SHA-1: c6242a4cf02ca58e5819c60506590d5f326e5f1f SHA-256: a3b0b18dc2cb0d45ebb3847412d436d0785278d731cba8dbe87d96a4c95c7046
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF file exhibits characteristics of a phishing lure, specifically using a browser update or extension installation pretext to trick users. The embedded URL `https://maypoin.ru/123?utm_term=google+chrome+android+new+tab+page` likely leads to a malicious download or redirect. The ML classifier and ClamAV detection strongly indicate malicious intent, aligning with a social engineering attack to compromise the user's system.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 6

  • 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.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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://maypoin.ru/123?utm_term=google+chrome+android+new+tab+page PDF link annotation
    • https://mutebomex.weebly.com/uploads/1/3/2/7/132740724/fajok.pdfIn PDF document text
    • https://fetevosave.weebly.com/uploads/1/3/1/4/131438058/248487.pdfIn PDF document text
    • https://cdn.sqhk.co/budajawisore/iaejeid/59554215010.pdfIn PDF document text
    • http://tilosag.mypressonline.com/adrenal_fatigue_the_21st_century_stress_syndrome_download.pdfIn PDF document text
    • https://maxazokal.weebly.com/uploads/1/3/1/6/131606281/xilozutamad_lojum_sikasen.pdfIn PDF document text
    • https://tugokuwotim.weebly.com/uploads/1/3/1/3/131379049/1659455.pdfIn PDF document text
    • https://xanodupujariris.weebly.com/uploads/1/3/0/9/130969381/lebegi.pdfIn PDF document text
    • https://zidevikab.weebly.com/uploads/1/3/4/5/134576262/xukasolozamujot_rofakoviwizez_zifipadevosapog_botubexovupo.pdfIn PDF document text
    • https://sagokawosulo.weebly.com/uploads/1/3/4/9/134904643/515a31db74834.pdfIn PDF document text
    • https://cdn.sqhk.co/luwagoma/agc9jj1/segoguxixazitanaguliwas.pdfIn PDF document text
    • https://sezibuginodeso.weebly.com/uploads/1/3/4/4/134470526/gatamu-tumerodupaga-zafujewosib.pdfIn PDF document text
    • https://cdn.sqhk.co/wimedizi/jejdX7d/xoretotajumexilikametaz.pdfIn PDF document text
    • https://bijazebis.weebly.com/uploads/1/3/1/3/131382141/8a22c8f08d8e.pdfIn PDF document text
    • https://cdn.sqhk.co/gopuxipo/kztjiGr/cyberghost_7_full_version.pdfIn PDF document text
    • https://bibonuben.weebly.com/uploads/1/3/4/5/134576194/wonapame.pdfIn PDF document text
    • https://gifimaxenewurup.weebly.com/uploads/1/3/4/4/134458705/fa9bc1b.pdfIn PDF document text
    • http://xejepurefe.scienceontheweb.net/viduwabomevubosopopa.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/sutawowirosuvuv/agatha_christie_le_crime_de_lorient_express.pdfIn PDF document text
    • https://s3.amazonaws.com/kuxegu/10221281439.pdfIn PDF document text
    • https://s3.amazonaws.com/voxulija/81443405892.pdfIn PDF document text
    • http://varirojemixu.myartsonline.com/hp_42s_manual_espaol.pdfIn PDF document text
    • https://s3.amazonaws.com/nonipesikiri/hoover_power_scrub_deluxe_carpet_washer_fh50150_brushes_not_spinning.pdfIn PDF document text
    • https://s3.amazonaws.com/mozedijiz/cygnett_freeplay_bluetooth_earphones_manual.pdfIn PDF document text
    • http://tosijikis.onlinewebshop.net/cg_police_sub_inspector_syllabus.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_off00021684.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x21684 5360 bytes
SHA-256: 357fabf11ac82d07ed82fb7c92977937f4aae70916dd86ab3d67f5497cd57073
font_01_sfnt_off000228a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x228A0 12532 bytes
SHA-256: ef6a2853580a8e5759c8da32e2ee8413734379e9d5da8602069200e8e356f742
font_02_sfnt_off00025230.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x25230 16092 bytes
SHA-256: 9af6fc3bf9d751f70540aea0fa47faa159a3604992cda23d2adcda3ffc5346b2
font_03_sfnt_off000266f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x266F7 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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