Malicious PDF — malware analysis report

Static analysis result for SHA-256 93e50d1de97a0ba7…

MALICIOUS

PDF

80.3 KB Created: 2021-09-11 14:00:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: 78521f1750ecf0d5d1d1851e736f6c11 SHA-1: 1f80563335431f5ac4cf9731454bc14dae7dd988 SHA-256: 93e50d1de97a0ba79649c6c0af59f684549a5aecbbf7b545f9cdae8bd45b4eac
146 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a QR-code lure. 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 0.9975

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
  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://synerhu.ru/uplcv?utm_term=zack+snyder%27s+justice+league+cut PDF link annotation
    • https://www.quatainvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613b0ea40c71b---surob.pdfIn PDF document text
    • http://aliceinformaticasrl.com/user/pages/lekapuxomafexe.pdfIn PDF document text
    • http://gaudi.tw/upload/files/54138586232.pdfIn PDF document text
    • http://chono.mn/uploads/userfiles/files/14487787111.pdfIn PDF document text
    • https://tennis-samara.ru/img/file/nipofimipise.pdfIn PDF document text
    • http://angarakshaksecurity.com/userfiles/file/lekulizenolaxejelexe.pdfIn PDF document text
    • http://jca-t.com/fck_image/file/23279990189.pdfIn PDF document text
    • http://xsteelstock.com/d/files/gerevavu.pdfIn PDF document text
    • https://moveo-sport.pl/userfiles/file/70896871286.pdfIn PDF document text
    • https://aimtronu.org/userfiles/file/vekoxefemomolosejosivefa.pdfIn PDF document text
    • http://sieuthikhoacaocap.vn/upload/files/25970151111.pdfIn PDF document text
    • http://baocaosudanang24h.com/uploads/image/files/tusoxevurekosimaroka.pdfIn PDF document text
    • https://foundlight.ca/home/foun6192/public_html/files/custom_files/file/dexutixawivupiduwuvugini.pdfIn PDF document text
    • http://konyanincigkoftecisi.com/userfiles/file/58476000766.pdfIn PDF document text
    • https://www.chinacimctrailer.com/wp-content/plugins/super-forms/uploads/php/files/d927f7b063164237b5f258ec376eea68/sonuwafal.pdfIn PDF document text
    • http://www.peritaonline.es/ckfinder/userfiles/files/53367083816.pdfIn PDF document text
    • https://jagominum.com/contents/files/6347743698.pdfIn PDF document text
    • http://pokebarslo.com/uploads/files/sivamefevonenilufifojuve.pdfIn PDF document text
    • http://dreiseengrundschule.de/files/35863684051.pdfIn PDF document text
    • https://lose-weight.tw/upload/files/68624605278.pdfIn PDF document text
    • http://thailaundry.com/imgUpload/files/rulajebedofijozesoj.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_off0000d2ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2EE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000eb05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB05 10856 bytes
SHA-256: 48eeef646633eedf19affac707c054e000d441162c890c5945da99f3e761f7ad
font_02_sfnt_off00010419.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10419 18444 bytes
SHA-256: 8c0bb25a6748584776accdd54238ff683508b057ba0b85294229837d07736ce6

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