Malicious PDF — malware analysis report

Static analysis result for SHA-256 9692394478012815…

MALICIOUS

PDF

84.9 KB Created: 2021-09-08 08:29:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: b0e7e19493cca5158b546b8b2e71163c SHA-1: 87e8dd4429be64871bf7616ed56c0d7a7e4c6fdc SHA-256: 9692394478012815716f4f0b19ffe1a5c705eb6649960ac6f3b74f1498bb2321
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for exploiting PDF vulnerabilities or redirecting users. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' and the numerous unknown URLs suggest an attempt to host malicious content or phish for credentials. ClamAV detection as 'Pdf.Phishing.Trojan' further supports the malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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 http://www.patriarca-batiment.com/ressource/site-image/files/pezerugigalometebi.pdf In PDF document text
    • https://ecohort.biz/userfiles/files/29283549893.pdfIn PDF document text
    • http://ajtoablakcentrum.com/_user/file/92851904663.pdfIn PDF document text
    • http://constantcontinuity.com/membership/data/files/sirugomidewanoseda.pdfIn PDF document text
    • http://lawrence-spruill.com/clients/42275/File/womalodedotowezisaxisimet.pdfIn PDF document text
    • https://styliststudios.com/imagesTE/file/38099856000.pdfIn PDF document text
    • https://hirurgija.me//files/pemugix.pdfIn PDF document text
    • http://eltonltd.ru/sites/default/files/uploads/13640607740.pdfIn PDF document text
    • http://kimbuunguyen.com/uploads/userfiles/file/rizepisiwinunepomasulared.pdfIn PDF document text
    • http://www.evisiontiendaonline.com/ckfinder/userfiles/files/nugedikewiravijixopezo.pdfIn PDF document text
    • https://marwaautorepair.com/nbloom/fckuploads/file/koxakifeju.pdfIn PDF document text
    • http://www.jindatunnel.com/up_files/file/7148046326.pdfIn PDF document text
    • http://krevue.cz/UserFiles/File/lepilaku.pdfIn PDF document text
    • https://www.dogandemir.av.tr/paketler/ckfinder/dosyalar/files/goteb.pdfIn PDF document text
    • https://communeouchamps.fr/userfiles/file/gegarolikepezojato.pdfIn PDF document text
    • http://thingsantiquesla.com/userfiles/files/19672617117.pdfIn PDF document text
    • https://groupunsur2.com/contents//files/37120279907.pdfIn PDF document text
    • https://prolocolidodisavio.org/ckfinder/userfiles/files/76875614999.pdfIn PDF document text
    • http://divapharma.com/uploaded/file/badidolokofibapapi.pdfIn PDF document text
    • https://emergent-partners.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bd83161c99---33440286428.pdfIn PDF document text
    • http://www.phsdcenter.com/temp/js/ckfinder/userfiles/files/nepupaganubegitevilelidu.pdfIn PDF document text
    • https://ratosatu.com/contents/files/lavorajemumagajuto.pdfIn PDF document text
    • http://aylincinarli.com/fckfiles/file/89819633246.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=graseby+3000+user+manualPDF link annotation
    • 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_off0000e587.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE587 10644 bytes
SHA-256: a6e8d2a097e696c4c7d5fbeb5148e6ab1ed8f2f377e469fc26aebf50c6517563
font_01_sfnt_off0000fdfb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDFB 18520 bytes
SHA-256: 428b989b2c74d2e12dd8393371aaa9dd0e99b09d82b9349dd4b0e097d201bc18
font_02_sfnt_off00012dd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DD1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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