Malicious PDF — malware analysis report

Static analysis result for SHA-256 0624492c201a1241…

MALICIOUS

PDF

77.3 KB Created: 2021-09-13 04:15:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 64ef187413716ee828410881b5ffbac3 SHA-1: 9487a6551805e0a2354de14491e43356c54aa148 SHA-256: 0624492c201a124153d5d67704b5ac0d4b954928aaf5498d18539a669c8730dc
156 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. Heuristics indicate it functions as a link farm, with numerous embedded URLs pointing to potentially compromised websites or disposable hosting. The primary URL suggests a lure related to 'hill climb racing hacked app', indicating a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9840

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
  • 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://drafthe.ru/uplcv?utm_term=hill+climb+racing+hacked+app PDF link annotation
    • http://xn--oy2b19v1mb1yi.com/userfiles/file/54039942951.pdfIn PDF document text
    • https://dsverano.com/UserFiles/File/89761282058.pdfIn PDF document text
    • https://fiscalonline.ro/app/webroot/files/userfiles/files/15669846652.pdfIn PDF document text
    • https://volandovia.it/public/fileeditor/file/jaxasifegamupajorikamori.pdfIn PDF document text
    • http://kleinschadenexperte.de/userfiles/file/zevolizamixavas.pdfIn PDF document text
    • https://kuni.ro/app/webroot/files/userfiles/files/89703191246.pdfIn PDF document text
    • https://www.abrasco.org.br/ckfinder/userfiles/files/gavikubedubibolebepija.pdfIn PDF document text
    • http://kovovyroba-nosniky.cz/UserFiles/File/79531554990.pdfIn PDF document text
    • http://bebaldebaran.eu/userfiles/files/tapepu.pdfIn PDF document text
    • https://ladachess.ru/userfiles/file/jawop.pdfIn PDF document text
    • https://www.zolmedis.lt/ckfinder/userfiles/files/puzusolipi.pdfIn PDF document text
    • https://goodluckfishing.com/ckfinder/userfiles/files/1103295523.pdfIn PDF document text
    • http://nitecoreromania.ro/files/file/gaseguwanupoxuveg.pdfIn PDF document text
    • http://budoprojekt.eu/obrazy/file/wovilobukatiziwofiguzaja.pdfIn PDF document text
    • http://chocolatycakes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613525d3ca334---26794854292.pdfIn PDF document text
    • http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134bf1d8864c---44928042511.pdfIn PDF document text
    • https://psg66.ru/admin/ckfinder/userfiles/files/98537896815.pdfIn PDF document text
    • http://ombs.ru/uploads/files/41723306936.pdfIn PDF document text
    • http://www.driftime.ee/wp-content/plugins/formcraft/file-upload/server/content/files/161368b52b96f5---wezevijigugazanegume.pdfIn PDF document text
    • https://legyenegyjonapod.hu/userfiles/files/rakarira.pdfIn PDF document text
    • https://www.funes.gob.ar/ckfinder/userfiles/files/bevubesiro.pdfIn PDF document text
    • http://jawarakreasi.com/file/wapiwasan.pdfIn PDF document text
    • http://bulk-supplies.com/userfiles/files/8593737186.pdfIn PDF document text
    • https://mygenius.ru/admin/ckfinder/userfiles/files/33920160080.pdfIn PDF document text
    • http://www.superior-inkjet.com/login/ckfinder/userfiles/files/xiraxuw.pdfIn PDF document text
    • https://partnyor.az/userfiles/file/visasomivunafobi.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_off0000ca0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA0F 10796 bytes
SHA-256: eaf7a92ec0242bf83c1b95c0893162be8056ead8f7f19368b0be316e0e1c8134
font_01_sfnt_off0000e22a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE22A 17580 bytes
SHA-256: 1243c61ba72ba11df9a57a1eef0e05f4f9936880a918bd87462a49ab3a8c8f1f
font_02_sfnt_off00010f79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F79 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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