Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f9f2bcacc44cd55…

MALICIOUS

PDF

85.3 KB Created: 2021-09-19 03:44:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 5d8b9296ff5a96603fc891c71a3e224d SHA-1: f005bed6eb8d98902ac78352ecf03dc6bd9a9944 SHA-256: 7f9f2bcacc44cd553ffbccff1da120f3795d9741f7578dd9a6e27cef95c026d4
204 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links to external sites, many of which appear to be compromised WordPress uploads or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of a 'download button' lure and instructions for a password-protected archive further indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://queure.ru/uplcv?utm_term=gta+v+5+ppsspp+file+download PDF link annotation
    • http://piri-piri.pl/ckfinder/userfiles/files/lojugowolimota.pdfIn PDF document text
    • http://zonwering-belgie.eu/ckfinder/userfiles/files/57407098287.pdfIn PDF document text
    • https://dm288.com/slicice/file/mejosu.pdfIn PDF document text
    • http://westpakusa.com/phpsites/vertical_living/uploads/file/niketowal.pdfIn PDF document text
    • http://vertex-decor.com/userfiles/file/jimudidanev.pdfIn PDF document text
    • https://777mto.org/contents/files/wibegitonozuvedexum.pdfIn PDF document text
    • https://www.cir.cloud/wp-content/plugins/formcraft/file-upload/server/content/files/1613878cd1345c---fajejaka.pdfIn PDF document text
    • http://jjkxmy.com/upload/files/202109092348245738.pdfIn PDF document text
    • http://savoie-outils-coupants.com/ckfinder/userfiles/files/bolala.pdfIn PDF document text
    • https://kingdomdatesuae.com/userfiles/files/wesunujotos.pdfIn PDF document text
    • https://chataigne-cevennes.fr/imgs/files/besigufalubewaniwamaxes.pdfIn PDF document text
    • https://vialivonica.eu/userfiles/files/nileligasurivotixexebe.pdfIn PDF document text
    • http://ekorepetycje.eu/Upload/file/86031399542.pdfIn PDF document text
    • https://www.sabiamente.es/wp-content/plugins/formcraft/file-upload/server/content/files/1614029518a42a---sanajasawobi.pdfIn PDF document text
    • http://iphysiology.ru/upload/dibowif.pdfIn PDF document text
    • https://seroinstitute.com/wp-content/plugins/super-forms/uploads/php/files/024710a323ee90a62cb116680cdcfeb3/65091973725.pdfIn PDF document text
    • http://architettoletiziamasciotta.eu/userfiles/files/fukuwuzapexete.pdfIn PDF document text
    • http://architettorobertafasola.eu/userfiles/files/42965952067.pdfIn PDF document text
    • http://sbriz.ru/userfiles/file/57917902381.pdfIn PDF document text
    • https://festival.bg/fckeditorfiles/file/demanefidewiri.pdfIn PDF document text
    • https://parvazyab.com/basefile/api203/files/sowek.pdfIn PDF document text
    • https://pezenasenchantee.fr/userfiles/file/lunumofokezafokebu.pdfIn PDF document text
    • https://fpcofmacon.com/nbloom/fckuploads/file/mexijegipugawenejub.pdfIn PDF document text
    • http://tunesistudio.eu/userfiles/files/fojozapow.pdfIn PDF document text
    • https://locktactyuma.com/userfiles/file/jifononuwunagaka.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_off0000e7d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7D1 10716 bytes
SHA-256: 2d23d5d4d79e7c4e1576106a6c33b065fa68b17fc64f0de6836eb6954cde9410
font_01_sfnt_off000100b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100B2 18040 bytes
SHA-256: 1a8cc5216c08fbbd7ae6c236e58d0bdd413c93df77dbd485b15aef0a1e1e0885
font_02_sfnt_off00012f04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F04 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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