Malicious PDF — malware analysis report

Static analysis result for SHA-256 d522646a4537df3e…

MALICIOUS

PDF

84.4 KB Created: 2021-09-07 19:20:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: ae53050b6759390f6e892824b7c8589e SHA-1: 75bd1b0cf9ee1e0f8ba73e11d13501876576219e SHA-256: d522646a4537df3ebcbe6709e8c7f7f8455fd0ba40eaec43daefdc0371935e97
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. Heuristics reveal it functions as a link farm, with numerous URLs pointing to compromised WordPress sites. These links are likely used to lure victims to phishing pages or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9905

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
  • 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.
  • 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://feriaesotericadeatocha.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608bbcfd0c7f2---61991390975.pdf In PDF document text
    • https://veglifekc.org/wp-content/plugins/super-forms/uploads/php/files/99322160693.pdfIn PDF document text
    • http://yomamasushitogo.com/uploads/files/pitasixulefus.pdfIn PDF document text
    • https://delphin-bau.com/ckfinder/upload/files/latigawamawimifetas.pdfIn PDF document text
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/63ab7907a9ca199ab2cbd6121804ecbf/84430743244.pdfIn PDF document text
    • https://agentcctv.com/userfiles/file/nifiketi.pdfIn PDF document text
    • http://schule.havonix.com/ckfinder/userfiles/files/71092264697.pdfIn PDF document text
    • http://hichipper.com/hichipper/uploadfile/file/2021081917270973499.pdfIn PDF document text
    • http://vodnik48.ru/content/file/24607036321.pdfIn PDF document text
    • http://businesslegalgroup.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/vimoxobadilizanugi.pdfIn PDF document text
    • http://masterkontroll.hu/ckfinder/userfiles/files/54136862282.pdfIn PDF document text
    • http://videoacceso.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c681c26cba5---53875201686.pdfIn PDF document text
    • http://ville-dammarie.com/ckfinder/userfiles/files/luxomavazugaganapetis.pdfIn PDF document text
    • http://lichnyiybrand.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160b83a69c9a2a---jidatowilezenativekoxiwav.pdfIn PDF document text
    • http://whuntex.info/userfiles/file/lezutedizadijadadusisomi.pdfIn PDF document text
    • https://www.actionconstructionjax.com/wp-content/plugins/super-forms/uploads/php/files/7f3103d7d9b41fa87ffc059d76385542/nakifizoz.pdfIn PDF document text
    • http://cissi.it/userfiles/files/nifuni.pdfIn PDF document text
    • https://notofthisgalaxy.com/wp-content/plugins/super-forms/uploads/php/files/hp6uo1dnhe43tebd3trj28las2/16081842014.pdfIn PDF document text
    • https://jvlegacyhomerepairsmd.com/nbloom/fckuploads/file/79501658586.pdfIn PDF document text
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b9baae88099---vexitirememosonuban.pdfIn PDF document text
    • http://prestopc.it/upload/file/zaruzesulawe.pdfIn PDF document text
    • https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2b6ea1df8d---15356302769.pdfIn PDF document text
    • https://akvaguru.hu/user/file/72513831183.pdfIn PDF document text
    • http://schokofontaenen.de/idata/48447494287.pdfIn PDF document text
    • https://growmytruck.com/wp-content/plugins/super-forms/uploads/php/files/f40f944c34be37b317ebcfb7cba4c1d8/jabunolopeg.pdfIn PDF document text
    • https://petandpuppies.com/userfiles/file/15799294896.pdfIn PDF document text
    • https://www.d-table.com/wp-content/plugins/super-forms/uploads/php/files/dbdef99c6625bb7a1183fa5afa70f202/rugefolifinobaburejukijo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=and+still+i+rise+free+pdf+downloadPDF 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_off0000e50a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE50A 10560 bytes
SHA-256: ef5839d56a3af27413a45b6664e3511dee76168427b53b0dedcdf2fd308b6516
font_01_sfnt_off0000fd4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD4B 17644 bytes
SHA-256: c49fce51d9ebaac86ddacc1b997623ee30bb42ee688104cf7f11a2db30b46d1a
font_02_sfnt_off00012b35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B35 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1