Malicious PDF — malware analysis report

Static analysis result for SHA-256 d05ecf9a8ca8a95a…

MALICIOUS

PDF

81.4 KB Created: 2021-09-16 00:08:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 344b06bc60a5f7b9dfd10078dfaf3b33 SHA-1: 239c697c5bc90742cd7e5b6380f9c33ec01d2458 SHA-256: d05ecf9a8ca8a95ab29820713b3d6ff411aaa7fd600ff23b7cfb206626339ab6
164 Risk Score

Malware Insights

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

This PDF file was identified as malicious by a machine learning classifier and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, containing numerous URLs that likely lead to further malicious content or downloads, disguised with lures like 'star wars galaxy of heroes mods apk'. The presence of compromised CMS upload links and disposable hosting suggests an effort to obscure the true origin and nature of the malicious infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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.
  • 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://cructi.ru/uplcv?utm_term=star+wars+galaxy+of+heroes+mods+apk PDF link annotation
    • http://oroblupiscine.it/userfiles/files/64642410557.pdfIn PDF document text
    • http://www.velkoobchod-man.eu/ckfinder/userfiles/files/99557321967.pdfIn PDF document text
    • http://bfttacg.marketsearching.com/upload/files/40251987209.pdfIn PDF document text
    • http://culfordequestriancentre.org/UserFiles/file/85080800218.pdfIn PDF document text
    • https://www.horisunmauritius.com/wp-content/plugins/super-forms/uploads/php/files/0d8cd01f03e14c10f4ea0acf5aaf1574/durunawebuwise.pdfIn PDF document text
    • https://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613991b23d72b---dagosunilonepusa.pdfIn PDF document text
    • http://rm-centr.ru/uploads/file/tejega.pdfIn PDF document text
    • http://strandedtattoo.info/file/logonux.pdfIn PDF document text
    • http://kimhoatra.com/upload/fckimagesfile/bafemo.pdfIn PDF document text
    • http://lamelove-zakryti.cz/userfiles/file/tajafimasubalosinewete.pdfIn PDF document text
    • http://decamiones.com/userfiles/file/nomomanozosuludiz.pdfIn PDF document text
    • http://worshipedia.mobi/sites/default/files/file/jopatemiluzu.pdfIn PDF document text
    • http://cloudinfo01.smartevolve.com/images/ckeditor/files/pomove.pdfIn PDF document text
    • http://stkvn.ru/wp-content/plugins/super-forms/uploads/php/files/1e84908d0fd167ce4fd91f572a9a2ca8/91924576574.pdfIn PDF document text
    • http://benthanhsgfarm.com/images/uploads/files/zivikigosopazonamazog.pdfIn PDF document text
    • http://quartierdete.fr/uploads/fckeditor/file/xijomidasoli.pdfIn PDF document text
    • https://gbp.dropship-online.com/userfiles/files/lumexinefopasir.pdfIn PDF document text
    • https://laflammerouge.ch/userfiles/files/35225954962.pdfIn PDF document text
    • http://nagymester.com/userfiles/file/gusunos.pdfIn PDF document text
    • http://yuanhebiotech.com/upload/files/jidonakil.pdfIn PDF document text
    • https://allora-tour.by/var/upload/file/pireligarajujivokugun.pdfIn PDF document text
    • https://novitas.ro/files/79851378354.pdfIn PDF document text
    • http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16133710c2ab8a---bifazukodi.pdfIn PDF document text
    • http://longarmacademy.net/fckeditor/userfiles/file/37957976518.pdfIn PDF document text
    • https://etevent.itweald.com/uploads/files/613cf44f9d628.pdfIn PDF document text
    • http://www.jimenez-casquet.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137e6b515a90---tipeg.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_off0000d43a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD43A 11220 bytes
SHA-256: 189723fab280d8cc1f65098a2118335a4e98b8575043a84741869ec87761e5c9
font_01_sfnt_off0000ee6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE6B 18824 bytes
SHA-256: db38c9ecd7f733d676d94d1573fec1ba024e653cd0a50a3d7afeb99da3d63fbc
font_02_sfnt_off00011f01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F01 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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