Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1179ad7f770ce1c…

MALICIOUS

PDF

80.1 KB Created: 2021-09-06 00:03:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 1ddee41dd785683c94c6b9c9608aac15 SHA-1: b83f2e7fafbded2d8c67d4cce6a670da7442619f SHA-256: f1179ad7f770ce1c9433a4feaff837dd22869f497ab04d54362e6b9e11f84b04
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to numerous compromised WordPress sites and disposable hosting domains, suggesting an attempt to distribute malicious files. The ML classifier strongly flagged this PDF as malicious. While no scripts were directly extracted, the structure and URL patterns are indicative of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9833

Heuristics 5

  • 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://businessservicesuk.com/userfiles/file/tagapapekekanatebepolal.pdf In PDF document text
    • https://wkd-uk.com/wp-content/plugins/super-forms/uploads/php/files/fdeaac1c14ee716b3e715484886056f1/21066410393.pdfIn PDF document text
    • https://djhelaly.com/wp-content/plugins/super-forms/uploads/php/files/872006a416137abb3696b77c332fe915/17700573271.pdfIn PDF document text
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/1607b3262f3df6---munopadukewalunatabar.pdfIn PDF document text
    • http://gilendor.cz/userfiles/file/92865944958.pdfIn PDF document text
    • https://coolinterier.sk/upload/files/niralov.pdfIn PDF document text
    • http://dm288.rs/slicice/file/40145834411.pdfIn PDF document text
    • http://amwordpress.org/wp-content/plugins/formcraft/file-upload/server/content/files/16088626d3b2b0---67629720349.pdfIn PDF document text
    • https://www.cedicar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5cd99b7cec---99575572689.pdfIn PDF document text
    • https://notofthisgalaxy.com/wp-content/plugins/super-forms/uploads/php/files/ilqf8rcbver7hcbi97igjqa9gq/ranexubifi.pdfIn PDF document text
    • http://ascensionchina.com/userfiles/file/tujuguxomezojewebazarili.pdfIn PDF document text
    • http://nakamurasangyou.jp/app/webroot/uploads/files/66066613519.pdfIn PDF document text
    • http://floridadressyourhome.com/uploaded_files/userfiles/files/43982658454.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081d50b039a3---likewavu.pdfIn PDF document text
    • http://asiancfea.org/userfiles/file/30075892543.pdfIn PDF document text
    • https://aokman-drive.com/d/files/66303673916.pdfIn PDF document text
    • http://jerilyndavisrobison.com/clients/870655/File/4115499959.pdfIn PDF document text
    • https://uaqbakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a404c0ad89a---pixugomejebapitawu.pdfIn PDF document text
    • http://ophtalmic-overnight.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160aba6d13e28e---39503862999.pdfIn PDF document text
    • https://nbtele.com/en/cache/fck_files/file/99281601287.pdfIn PDF document text
    • https://shining4u.com/wp-content/plugins/super-forms/uploads/php/files/fbdcb72965c2ab29288c4ea97fb2dd35/96186166586.pdfIn PDF document text
    • https://palcev.ru/userfiles/file/jimej.pdfIn PDF document text
    • https://mindweave.co.uk/wp-content/plugins/super-forms/uploads/php/files/gcns7231a7amngnob1i95dqvi8/94714473172.pdfIn PDF document text
    • http://clearlakesd.org/wp-content/plugins/formcraft/file-upload/server/content/files/1610075240fb9d---vadafofokes.pdfIn PDF document text
    • https://stcatherine.ac.ug/wp-content/plugins/formcraft/file-upload/server/content/files/1606d093d9fa97---50877787865.pdfIn PDF document text
    • http://hainescentreasia.com/images/file/65439775496.pdfIn PDF document text
    • http://paillasse.hu/userfiles/file/gaviwefup.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=damaged+pdf+file+repair+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_off0000d736.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD736 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ef4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF4D 10664 bytes
SHA-256: 4619ac235975c717887e0845996e07759197248f59f25258d6d9c047e1fa36e0
font_02_sfnt_off00010777.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10777 16664 bytes
SHA-256: 2b37fd190904e6c0b0fed30a7a4549091b2affb02dc2119e64cc200ec8344d38

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