Malicious PDF — malware analysis report

Static analysis result for SHA-256 aeea2d1471d3463f…

MALICIOUS

PDF

74.1 KB Created: 2021-09-13 00:44:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: fbe98e1e2df2bfb0157e3e8a3ae964e6 SHA-1: 897b26a1e0524c0f5c329bd4431a0759d371005e SHA-256: aeea2d1471d3463fe2b9b5c8810210afe522814e9f155a9763a956e5fd472e34
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links pointing to compromised WordPress sites, indicating a link farm designed to redirect users to malicious content. ClamAV and ML classifiers confirm its malicious nature, specifically flagging it as a phishing trojan. The presence of external URIs and link farms suggests an attempt to exploit users by directing them to potentially harmful sites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://cructi.ru/uplcv?utm_term=survey+research+methods+pdf PDF link annotation
    • https://ceadersvalet.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612ff4874dffe---tisusibo.pdfIn PDF document text
    • https://cargobull.cz/res/file/vajokobigegenuvogo.pdfIn PDF document text
    • https://nhahangbienhaitien.com/uploads/files/20652774208.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613dff8324f98---28794412801.pdfIn PDF document text
    • https://rjiminfra.com/wp-content/plugins/super-forms/uploads/php/files/867aa65c2a6262ef1cd1eb59e27d10d6/29958952515.pdfIn PDF document text
    • http://aliguoriarchitetto.eu/userfiles/files/sukajugedudipajotudu.pdfIn PDF document text
    • https://kakvkusno26.ru/wp-content/plugins/super-forms/uploads/php/files/b7eef18eb471223d752d8938af4b03c1/84021561280.pdfIn PDF document text
    • http://global-gypsum.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131a16803868---57471237525.pdfIn PDF document text
    • https://ngonluathan.vn/images/ckeditor/files/femanoratunajosotifitod.pdfIn PDF document text
    • http://sweed-trans.eu/ckfinder/userfiles/files/9117139665.pdfIn PDF document text
    • http://kxqcgs.com/filespath/files/20210909003515.pdfIn PDF document text
    • https://enerjimakine.com/tsrm1/img/userfiles/file/xabanesag.pdfIn PDF document text
    • http://vietkinggroup.com/uploads/userfiles/file/76882814732.pdfIn PDF document text
    • https://economiadecomunion.com/ckfinder/userfiles/files/lavokamosuzaruriminizijo.pdfIn PDF document text
    • https://korzo-galeria.hu/files/file/60359034469.pdfIn PDF document text
    • http://e-junghan.com/userData/board/file/xupanolixaliximutadak.pdfIn PDF document text
    • http://merklink.nl/site/data/ws/files/bawetozomutulifova.pdfIn PDF document text
    • http://officeharbor.com/pdtInfo/32845044308.pdfIn PDF document text
    • http://geometrarontani.it/userfiles/files/rujobiketomuxiteb.pdfIn PDF document text
    • http://cu-hinothai.com/ckfinder/userfiles/files/femugabikezisegederogixur.pdfIn PDF document text
    • http://kwiatmetal.pl/userfiles/file/jawoletizateredulorowami.pdfIn PDF document text
    • http://mbeautyconcept.com/upload/content_images/file/vadidozoluxuwizoxeta.pdfIn PDF document text
    • https://www.edutechusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139285aebbc1---99537795957.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_off0000c201.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC201 11000 bytes
SHA-256: 695b33973da9ad942eae2484fb4abb2ba5434be9fd04125fb6bdb4008139817d
font_01_sfnt_off0000dba7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBA7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f3b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3B9 15716 bytes
SHA-256: b50c58a4527c89f96864806649f4753b2450abbaa21091b915f2b91218f96c57

Open this report in the interactive analyzer, or submit your own file for analysis.