Malicious PDF — malware analysis report

Static analysis result for SHA-256 d08dea3aae13a915…

MALICIOUS

PDF

81.5 KB Created: 2021-07-01 14:46:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 74d5f4a903bdc88da2e0704b7956048f SHA-1: 3c8e0cc6adc5a91449c49aeb2d55b9e5946c3bb4 SHA-256: d08dea3aae13a91576a36b48667273040393aeed93b646e9ba092b142947f3fa
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution attempt. It functions as a link farm, containing numerous URLs pointing to compromised WordPress sites and other disposable hosting. These links likely lead to further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9833

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://oniceh.ru/uplcv?utm_term=easy+chicken+minestrone+soup PDF link annotation
    • http://www.icodar.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607472fc98be8---xalozapepa.pdfIn PDF document text
    • https://lakeshoresmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/dinr42lnqljq6tt5n6apa0q030/powaxuwexexujefoz.pdfIn PDF document text
    • https://egca.fr/userfiles/file/vogosixunasukenew.pdfIn PDF document text
    • http://brmhn.com/userfiles/file/20210611003136_uj8h7e.pdfIn PDF document text
    • http://kangs78.com/clients/66216/File/ledajukurikan.pdfIn PDF document text
    • https://law.myvzl.com/wp-content/plugins/super-forms/uploads/php/files/39258b46tiarg2lfmguc17luas/kokodolidixuxawere.pdfIn PDF document text
    • http://raduzhniy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6d987b04a9---marozexalamawesu.pdfIn PDF document text
    • http://ciaooo.ru/uploades/userfiles/file/54832765186.pdfIn PDF document text
    • http://studiolorenzoni.eu/userfiles/files/memaf.pdfIn PDF document text
    • https://calldidocta.com/wp-content/plugins/super-forms/uploads/php/files/ca920d158d5bbadf92e33134aefa7cd4/68134366733.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a75eb1b62f---36250253328.pdfIn PDF document text
    • https://martybermanassociates.com/wp-content/plugins/super-forms/uploads/php/files/11aa8756da4866dfae4e72c782c99281/24305820707.pdfIn PDF document text
    • http://sacmacbook.net/userfiles/file/36510007926.pdfIn PDF document text
    • http://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608564bbaf1ad---79412817158.pdfIn PDF document text
    • http://sosonomo.com/ckfinder/userfiles/files/82058532550.pdfIn PDF document text
    • http://akicgiyim.com/userfiles/file/12409714366.pdfIn PDF document text
    • https://cissud.com/uploads/ck_editor/files/begoto.pdfIn PDF document text
    • http://usaoxin.com/userfiles/2021-6/file/digukaxapajewoxujakuxu.pdfIn PDF document text
    • http://boxethai38.com/upload/file/47563160823.pdfIn PDF document text
    • https://sckstone.com/wp-content/plugins/super-forms/uploads/php/files/6f086e1712578ff7965ca25609456caa/kimatoworuvifose.pdfIn PDF document text
    • https://bizdrive.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/160abfb53bde69---82324124162.pdfIn PDF document text
    • https://brandonsmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/ejg42e5frk0l13303rd89m2co5/lefijokedemavupeniwosote.pdfIn PDF document text
    • http://bamt.be/wp-content/plugins/formcraft/file-upload/server/content/files/160a6e827e09ec---26571788111.pdfIn PDF document text
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/ace6234796be2403c0ddaf24dccd2a95/71848736474.pdfIn PDF document text
    • https://nuevocoach.co.uk/wp-content/plugins/super-forms/uploads/php/files/012115331b16a179c95340dec2e9ce2c/sovetipodakomitapubawot.pdfIn PDF document text
    • http://chataphan.com/file_media/file_image/file/dutunejulutumajiluluze.pdfIn PDF document text
    • http://oneself.pro/wp-content/plugins/formcraft/file-upload/server/content/files/16084d987c9c67---95035079280.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_off0000db9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB9B 10884 bytes
SHA-256: ee49e4588d3c3ebee517c0f134bdfccf2acd985c899b0a2d4643ee3cc3cc77b2
font_01_sfnt_off0000f4a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4A4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010cb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CB6 16928 bytes
SHA-256: 8b8e67dea97ddb8a8528599fa8b849e2ee9c0b65ff85d4d12c684d9523bda8d5