Malicious PDF — malware analysis report

Static analysis result for SHA-256 3aed7ae57ffcf4bc…

MALICIOUS

PDF

87.8 KB Created: 2021-09-09 06:03:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: 917465705d55b9d5ae58325daf93e6c3 SHA-1: ab8461d1b729cfa9b99b1bf3c45e716b5ba05f8b SHA-256: 3aed7ae57ffcf4bc5af0aec9df45be6f736ad6e30da52f6d5bd3c28aaea7f8fa
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://pixomot.ru/uplcv?utm_term=how+to+retrieve+blocked+messages+on+whatsapp+android PDF link annotation
    • http://espaciocultivarte.com/ckfinder/userfiles/files/nasov.pdfIn PDF document text
    • https://lanegarrett.net/userfiles/file/24613695693.pdfIn PDF document text
    • http://buddhavehicle.com/userfiles/file/tuxorivi.pdfIn PDF document text
    • https://mobiligennari.com/userfiles/file/xewadikadotosibosemaga.pdfIn PDF document text
    • http://dulichtantai.com/files/uploaded/files/813324281.pdfIn PDF document text
    • http://cortabellanews.com/userimages/38699366855.pdfIn PDF document text
    • https://expomediainc.com/upload/file/besapiwujilalifedegul.pdfIn PDF document text
    • http://vinhomeshaiphong.net/app/webroot/img/files/wutetujikeluwazifujuxu.pdfIn PDF document text
    • http://xn--80aagkbrca3apkgkee0a1bi.xn--p1ai/ckfinder/userfiles/files/68257493854.pdfIn PDF document text
    • http://maekuangudomthara.com/ckfinder/userfiles/files/kavatobebanagirev.pdfIn PDF document text
    • http://sllight.ru/design/img/upload/file/87281167674.pdfIn PDF document text
    • https://digireg.com/upload/68563111987.pdfIn PDF document text
    • http://librojuridico.com/aym_images/files/dawodogujafokodopafusinij.pdfIn PDF document text
    • http://tipiland.net/upload/file/32135777794.pdfIn PDF document text
    • http://levotst.com/uploads/files/56541724779.pdfIn PDF document text
    • https://delcinfo.ru/img/files/files/pikaxirovidunibuvowoteran.pdfIn PDF document text
    • https://tramtron.vn/uploads/files/files/razus.pdfIn PDF document text
    • https://dmshospital.com/mm_engg/files/68428717322.pdfIn PDF document text
    • http://infosierra.es/images/editor/jewadavaduzokufosavigoru.pdfIn PDF document text
    • https://blagoustroystvo24.ru/ckfinder/userfiles/files/mujigumu.pdfIn PDF document text
    • http://www.appsolutely.sg/wp-content/plugins/formcraft/file-upload/server/content/files/1613078466cd26---5091796373.pdfIn PDF document text
    • http://edv-denk.com/userfiles/file/72592564575.pdfIn PDF document text
    • http://hide-bo.com/img/tmp/file/bamozi.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eea1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEA1 11336 bytes
SHA-256: 75869ea03a03e744310be1e5af8eff2b6e9a345ca1f0e8bf33a960dfef3b4fae
font_01_sfnt_off000108b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108B2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000120c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120C4 18656 bytes
SHA-256: 257d294c64e9ac2b6b4a454dbdcab116c8c41437d2e7b5ddf25da263657ba557

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