Malicious PDF — malware analysis report

Static analysis result for SHA-256 e47d4ed4387b0b92…

MALICIOUS

PDF

92.7 KB Created: 2021-07-01 17:46:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 55d109f3626c0aa0bc3429dfc69f9b24 SHA-1: ed077a1f7c790b7ebfcc91220950a54996d81764 SHA-256: e47d4ed4387b0b92e8b8e74ff1cdf16c31b98fbdf615c1ecf5163135520707e9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised CMS upload storage or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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 http://vasamo.org/pds/userfiles/files/datedidexode.pdf
    • https://rebates.forex/wp-content/plugins/super-forms/uploads/php/files/66rp8n5mnk2a66n87e0o9p8pa1/tunuwonexedote.pdf
    • http://www.predia.cz/userfiles/file/28762234289.pdf
    • http://studiosantese.eu/userfiles/files/lugojibevi.pdf
    • http://longarmquiltacademy.com/fckeditor/userfiles/file/tozifizatewewetabukezu.pdf
    • http://nhs1980alumni.com/clients/878257/File/fatibi.pdf
    • http://www.hypnotiseur.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080fccd69baf---jivogu.pdf
    • http://imi.vc/upload/files/20831637452.pdf
    • http://incucinaconalberta.com/userfiles/files/80728411268.pdf
    • https://sv-fin.ru/wp-content/plugins/super-forms/uploads/php/files/e0a7a39284148e543c033b755a990562/34805176344.pdf
    • https://studiogreenwich.ru/wp-content/plugins/super-forms/uploads/php/files/13a4f5741e11717aa79f4310c12f1c01/7145364485.pdf
    • http://sutphinsgermanshepherds.com/clients/21958/File/56112644185.pdf
    • https://infravoip.com/wp-content/plugins/super-forms/uploads/php/files/c24084d09681868bac37912ed7b32efa/fasufuduxekusemolovexus.pdf
    • https://allcreaturesinc.com/files/files/45269580856.pdf
    • https://anfauglir.com/images/file/paputi.pdf
    • http://smn68.com/clients/75339/File/73462540425.pdf
    • http://oticonshop.net/ckfinder/userfiles/files/881267421.pdf
    • https://sckstone.com/wp-content/plugins/super-forms/uploads/php/files/48f5f3f7971ed7ca31aa5e8662d4a8da/faxedore.pdf
    • https://www.hed-endo.hr/wp-content/plugins/formcraft/file-upload/server/content/files/16086658d940e5---vewobenuzumulu.pdf
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/0b87609b0b20932468d97b2fd4875cf1/visunemunoxowanaw.pdf
    • http://rgn2u.com/userfiles/files/53409143445.pdf
    • http://dailyxedayhang.com/userfiles/files/nufadixeko.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=ac+technician+interview+questions+and+answers
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000105f4.bin
aa821a3da4a716954fca90f4dcc473d1404a030ac9ab9a5c2a2e3943b4418e6e
pdf-font-stream PDF embedded font (sfnt) at offset 0x105F4 17636 bytes
font_01_sfnt_off0001346a.bin
0523668842d1b19710209e21692c3f542f8b1b811d61ef8df3ad4b57df6e72b1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1346A 10800 bytes
font_02_sfnt_off00014d29.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x14D29 16792 bytes