Malicious PDF — malware analysis report

Static analysis result for SHA-256 df79ac0eb28b11bf…

MALICIOUS

PDF

90.6 KB Created: 2021-09-20 09:45:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 7bec20d9f70fe0217b8928f39fe92dd5 SHA-1: 066016cc486633c9a8c56c6c496bf73064fa2023 SHA-256: df79ac0eb28b11bfa7a2eff0837525ef71c8c8ddce58aabb16169532586fe03a
164 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV. It contains an embedded JavaScript stream and numerous external URIs, many of which point to compromised CMS uploads or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of JavaScript indicates an attempt to execute code, likely to facilitate further exploitation or download additional payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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 https://cructi.ru/uplcv?utm_term=greyhound+full+movie+123 PDF link annotation
    • http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613f99de1939e---vebudidavupedovedipurora.pdfIn PDF document text
    • http://aqbnb.com/uploadfile/file/61836044411.pdfIn PDF document text
    • http://glavis.biz/userfiles/file/voxabujolinikixodut.pdfIn PDF document text
    • https://eqonetech.com/upload/userfiles/files/nipaxomivovozatosuguliren.pdfIn PDF document text
    • http://obkladacstvikolar.com/content/nixevopikuwanogegozutan.pdfIn PDF document text
    • https://vonia.mikludava.lt/images/files/lawijesabitafitifajunedos.pdfIn PDF document text
    • https://lerivagedesmilleetangs.com/caningest/images/file/xagogozogosuvopoxotu.pdfIn PDF document text
    • http://dobraukraina.org/sites/all/sites/dobraukraina.org/files/lalekilivokoxedugisiwagi.pdfIn PDF document text
    • https://pomacanthe-art.fr/imagebeforeafter/files/35516770235.pdfIn PDF document text
    • http://kondicionery-krasnogorsk.ru/upload_picture/file/gidetirapolibupisufik.pdfIn PDF document text
    • http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/161472883ee3e4---lotonipir.pdfIn PDF document text
    • https://stiglic.sk/userfiles/file/59391823330.pdfIn PDF document text
    • https://tasleemdubai.com/userfiles/files/kuwusajomulosefamiwegawax.pdfIn PDF document text
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/g6jvij79s6bdl1s450c4klgmi2/bakulimetu.pdfIn PDF document text
    • http://remont-elektro.eu/archiv/file/zegakomoropoleloj.pdfIn PDF document text
    • http://fli.edu.mn/ckfinder/userfiles/files/29630432965.pdfIn PDF document text
    • http://archinfo.ru/uploads/file/63189321899.pdfIn PDF document text
    • http://crabandclaw.com/uploads/files/52384126563.pdfIn PDF document text
    • https://austdoorcaocap.com/upload/files/13584952915.pdfIn PDF document text
    • http://hc6999.com/userfiles/files/56471942992.pdfIn PDF document text
    • http://m-styleauto.com/js/upload/files/98152406560.pdfIn PDF document text
    • http://azizavacanze.com/userfiles/files/modibulivesifipig.pdfIn PDF document text
    • http://thekreativecompany.com/uploaded_files/userfiles/files/bexud.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_off0000f7e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7E8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010fff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FFF 10852 bytes
SHA-256: d21434882b3bf1bf40e3cc28640c805a4052793d65bf8a8a9d1fcfd6db0274ae
font_02_sfnt_off000128f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128F5 20260 bytes
SHA-256: 4c670b3c09351519fd28584e9e71e5f154fcb65c723d60fd51785166f38458b8

Open this report in the interactive analyzer, or submit your own file for analysis.