Malicious PDF — malware analysis report

Static analysis result for SHA-256 5daa7200730dae06…

MALICIOUS

PDF

90.0 KB Created: 2021-07-30 08:21:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: b43ede004f2dce425d8feee0d39f2f16 SHA-1: 01828d5e3d400493bbd3a5db078181ec4b6a6fd8 SHA-256: 5daa7200730dae0671aa56831eab8cf8094e34579f3166f35afd0b0dc721e3ab
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous URLs that likely lead to phishing sites or malware downloads. The presence of external URIs and link farms on potentially compromised or disposable hosting suggests a tactic to distribute malicious content or harvest user credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9945

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://ketchas.ru/uplcv?utm_term=beginner+calisthenics+workout+for+weight+loss PDF link annotation
    • https://monamifrance.com/FileData/ckfinder/files/20210619_AB8464064367A96D.pdfIn PDF document text
    • http://hoteldarim.ir/basefile/hoteldarimir/files/56625302109.pdfIn PDF document text
    • http://archpiudue.com/userfiles/files/vuzojuwonex.pdfIn PDF document text
    • http://hz-karavany.cz/ckfinder/userfiles/files/ridaxogijejuj.pdfIn PDF document text
    • http://dpsszczytno.pl/photo/file/wuzokazodofaj.pdfIn PDF document text
    • http://dh-life.com/ckfinder/userfiles/files/48122114665.pdfIn PDF document text
    • https://atlanthealth.com/wp-content/plugins/super-forms/uploads/php/files/ebc4cb25c76a0b8720f9b90cdfdb2e5b/bedadumojanimov.pdfIn PDF document text
    • https://sportli.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160831bba41153---29671227321.pdfIn PDF document text
    • http://archinfo.ru/uploads/file/86381814093.pdfIn PDF document text
    • https://tuabogadoangel.com/wp-content/plugins/super-forms/uploads/php/files/6ecc80d1582acd9c719cc04c8bd8be83/50111557926.pdfIn PDF document text
    • https://cremeconferences.com/wp-content/plugins/super-forms/uploads/php/files/628621cc2242fc33fea009d42a770459/57853358902.pdfIn PDF document text
    • https://www.corridar.com/wp-content/plugins/super-forms/uploads/php/files/gd15bin8f34sk9n82udp4mjael/lozozarotapidivoleke.pdfIn PDF document text
    • https://www.kadeavenue.com/wp-content/plugins/super-forms/uploads/php/files/4c0e0da4e2d21e0af1a04b8a9330b7f6/37916549832.pdfIn PDF document text
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/a3a07a3b363eeb57efe06313e904dc61/nidagozut.pdfIn PDF document text
    • http://vipdiler.ru/files/file/48791923863.pdfIn PDF document text
    • http://spamsmsgiare.com/media/ftp/file/nuxaveteninonewo.pdfIn PDF document text
    • http://sweetbasketsbyjackie.com/clients/864293/File/6445536054.pdfIn PDF document text
    • http://marinda.ru/pics/images/file/milugufiwiwe.pdfIn PDF document text
    • https://autoroman-service.ro/imagini_ws/kabiwizumozewitabosut.pdfIn PDF document text
    • http://atol-res.pl/uploads/file/44427165588.pdfIn PDF document text
    • https://assignmentmart.com/ckfinder/userfiles/files/famuzesufukebi.pdfIn PDF document text
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f0a3c50e141---jetupitokunememagedud.pdfIn PDF document text
    • http://velocimapper.com//webfiles/file/fisireraxeg.pdfIn PDF document text
    • http://jointrilogy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c9417a2195---xofojosovemapajozerabige.pdfIn PDF document text
    • https://liniagdanskzydowo.pl/files/85242445469.pdfIn PDF document text
    • https://www.lowdoc-loans.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16081e5700f868---gokizexudunawoxosigoziju.pdfIn PDF document text
    • http://razaviota.ir/basefile/razaviotair/files/37975364247.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_off0000f94e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF94E 10944 bytes
SHA-256: 7e2f3896dfbaefe98867b50ff4e6414df1bc42f037c71e3268f741d3ade66f4d
font_01_sfnt_off000112b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112B7 17156 bytes
SHA-256: f7264697bfcd9a2854bdec96a59d7fc579473e55e4c13c802b167e4d4324855c
font_02_sfnt_off00013faa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13FAA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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