Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c7a212532a28d9a…

MALICIOUS

PDF

72.7 KB Created: 2021-09-08 04:05:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 54c9446648b29ca168c1e237a631b80d SHA-1: f94cdd9a53994541c5436d1842eee361eca51587 SHA-256: 7c7a212532a28d9a456a94e78272811d946f37a73cf70cf3f090ef888b121478
156 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs, many pointing to compromised websites or disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery via malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://himalayanwanderer.com/himalayan/userfiles/files/16229839500.pdf In PDF document text
    • https://daleel.global/wp-content/plugins/super-forms/uploads/php/files/ti0ocd249kv17gp7u2opr0uoc3/42105917509.pdfIn PDF document text
    • http://www.stallionreadymix.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1611a3a2a33e57---87025096221.pdfIn PDF document text
    • http://cmtdental.com/upload/ckimg/files/pomixuwerivo.pdfIn PDF document text
    • http://mirembeestate.co.ug/wp-content/plugins/formcraft/file-upload/server/content/files/1609ab3c8b0d9c---wixisepodomumo.pdfIn PDF document text
    • http://detikakdeti.ru/img/file/34743848745.pdfIn PDF document text
    • http://ddservice-bmw.pl/userfiles/file/43343736076.pdfIn PDF document text
    • http://kaplanpm.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2e166bfecb---nagujajolekizisa.pdfIn PDF document text
    • https://kuepancong.com/contents//files/vipuliguj.pdfIn PDF document text
    • https://centar-znr-zop.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160deb993d5708---90414343345.pdfIn PDF document text
    • http://yesilderecine.com/admin/editor_resim/file/84580086750.pdfIn PDF document text
    • http://normel.org/files/upload/file/lifekegarosopubul.pdfIn PDF document text
    • https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2e73607071---kapujubizel.pdfIn PDF document text
    • https://clubesolbra.com/uploads/files/nevuposixosemipulavap.pdfIn PDF document text
    • https://www.dyna-tech.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1606c788bd296f---talibefibinox.pdfIn PDF document text
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/9197dbba143c510db3dbc72816ce2e51/sibunimupado.pdfIn PDF document text
    • http://miamiwars.pl/wp-content/plugins/super-forms/uploads/php/files/520e571b2214af4c48a999175b0959f6/desabilaz.pdfIn PDF document text
    • https://binarbaidfabrication.com/public_html/userfiles/file/wejunaxowuwizemusamuz.pdfIn PDF document text
    • https://www.enviedecrire.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608eab0a9f680---roxezetimotaxejajexetenad.pdfIn PDF document text
    • http://nitm.ac.in/nitmeghalaya/ckfinder/userfiles/files/wenotezaxopuposiku.pdfIn PDF document text
    • http://aahsclassof1978.com/clients/b/b6/b6117739535924054831d33ecd54b00a/File/xudir.pdfIn PDF document text
    • http://dekoblickfang.de/userfiles/file/jumotefipozet.pdfIn PDF document text
    • https://acethamessecurity.co.uk/wp-content/plugins/super-forms/uploads/php/files/02fcce41ed508e57faf905c416156e4e/40023131509.pdfIn PDF document text
    • https://mvmdigital.gr/files/files/ruxodulinosomovalitigiva.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=baixar+free+pdf+to+jpgPDF 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_off0000ba35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA35 10640 bytes
SHA-256: 507f9dcb3209f3d252524a8c6221cb960c771cd19cb7d7a3b2d1873ea150ae9e
font_01_sfnt_off0000d277.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD277 16700 bytes
SHA-256: e0700aff7983d8c874d7f3ce1248a3d42104d1ebfe190706889fd6c2e813bf91
font_02_sfnt_off0000fd39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD39 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1