Malicious PDF — malware analysis report

Static analysis result for SHA-256 9225fd431940458b…

MALICIOUS

PDF

90.2 KB Created: 2021-06-29 10:54:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: 450d99e7367a681a43a6471408ffa2eb SHA-1: 27d35a0c292468f1a4fd283b3503cfe24ae49867 SHA-256: 9225fd431940458b2edd671f274d2fac9e04aa649c4e5c11fc5d8ff718b6eb51
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to distribute malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery through these external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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://crysiq.ru/uplcv?utm_term=writing+motivation+letter+for+masters+degree PDF link annotation
    • http://ekonopuntos.com/campannas/file/89163770407.pdfIn PDF document text
    • https://www.lamuccacompany.com/wp-content/plugins/super-forms/uploads/php/files/a4b5f6c30470de833b64c6a31886f540/81641256688.pdfIn PDF document text
    • http://www.idenet.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609b333c7adcf---bowofawimiverowexiri.pdfIn PDF document text
    • https://www.higher-energy-trampolineclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086ec7547acb---vakimav.pdfIn PDF document text
    • http://yule-sign.com/upload/editor/file/20210625105356.pdfIn PDF document text
    • https://remoteworkerclub.com/wp-content/plugins/super-forms/uploads/php/files/901dfe60f08bdacdfdb6dfa1936d8271/nazedewanojegu.pdfIn PDF document text
    • https://stollerco.com/testingsites/advantage_aviation/assets/media/file/nudas.pdfIn PDF document text
    • https://www.hadlowsecurityshutters.com/wp-content/plugins/super-forms/uploads/php/files/2bdbcd969bd2a2ffbe69afcf3be94a22/dowibesexum.pdfIn PDF document text
    • https://www.lightingsolutionsal.com/wp-content/plugins/super-forms/uploads/php/files/ab2c0b0ee8af33a2fbb175d227da868c/1722073794.pdfIn PDF document text
    • https://messianic.live/wp-content/plugins/super-forms/uploads/php/files/639c19205faedece662257fd2ee3a940/jatexo.pdfIn PDF document text
    • http://gps-tw.com/CKEdit/upload/files/49924995920.pdfIn PDF document text
    • https://roadtoring.com/wp-content/plugins/super-forms/uploads/php/files/84843408da1817156c057f91dbe1193f/21571345565.pdfIn PDF document text
    • https://carpanea.it/wp-content/plugins/super-forms/uploads/php/files/f63cbd60c4aa692ec387cded82b88d91/penulujavoges.pdfIn PDF document text
    • http://ukrainski-rosyjski.pl/userfiles/file/ledagurire.pdfIn PDF document text
    • http://xn--80an2aej.xn--p1ai/up/file/nurupig.pdfIn PDF document text
    • https://singaporeroadshow.com/wp-content/plugins/super-forms/uploads/php/files/413ad9a224829c397ef80d8d0942ad16/wugivekegi.pdfIn PDF document text
    • http://getem.pl/files/file/98216591382.pdfIn PDF document text
    • http://atut-biuro.com/uploaded/file/wolododijawufapepepago.pdfIn PDF document text
    • http://wecans.net/_UploadFile/Images/file/nupalodomejun.pdfIn PDF document text
    • https://yournew.site/wp-content/plugins/super-forms/uploads/php/files/i5pfcffb0t5c1ai74rfrl3aumu/sinosajojosemuniv.pdfIn PDF document text
    • https://houstoncoinshow.org/FCKeditor/file/tidunus.pdfIn PDF document text
    • http://4grd.com/cmsimages/file/37240566754.pdfIn PDF document text
    • https://irrisyst.eu/files/file/14293466207.pdfIn PDF document text
    • https://jdbailbonds.com/wp-content/plugins/super-forms/uploads/php/files/0beede7793c185c9481a1cedee7eb92a/nituwil.pdfIn PDF document text
    • http://ajivikafinance.com/userfiles/file/pibagonumowareru.pdfIn PDF document text
    • https://www.mnspineandsport.com/wp-content/plugins/super-forms/uploads/php/files/555df8f5b947a57e4799477f2c547edf/98456909655.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_off0000fd85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD85 10756 bytes
SHA-256: 4eabbf03871015047c6dbe5777da946ac20499b7610c585ea92bf7a096b9d20f
font_01_sfnt_off0001160e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1160E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012e20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E20 17248 bytes
SHA-256: caed463b05cbd4d5757c202dbfa195f792c497c788cb5f53393f0b5e28eaea1d

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