Malicious PDF — malware analysis report

Static analysis result for SHA-256 32d675bf1211f36e…

MALICIOUS

PDF

81.8 KB Created: 2021-09-05 20:52:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: ef3356d4c2ed171c809d99d5226240ef SHA-1: 95c22b78fa32a9ad118036c796f430f104f60279 SHA-256: 32d675bf1211f36e805dff5a7a2540613e46e3dfd9a4fa92eadaa14dafe1964c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document functions as a link farm, containing numerous URLs pointing to compromised WordPress sites and disposable hosting, suggesting it's used to distribute phishing content or further malware. The presence of external URIs and link farm heuristics strongly supports this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://inwebjor.ru/uplcv?utm_term=difference+between+compound+and+mixture+pdf PDF link annotation
    • http://ownlines.com/upfiles/file/54046460739.pdfIn PDF document text
    • https://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ada3c1dacab---8712371041.pdfIn PDF document text
    • https://realestateconnect.pro/wp-content/plugins/super-forms/uploads/php/files/pd6jqvpbvrn26kobbkmeeeicc1/vavitunuvowuwonuwi.pdfIn PDF document text
    • http://theopenhouseclub.com/wp-content/plugins/super-forms/uploads/php/files/9a7a0a1052b881bef56e665193187bb5/lumuwijixitefakazela.pdfIn PDF document text
    • http://arunimaflavours.com/userfiles/file/nesubefixa.pdfIn PDF document text
    • http://decom.pro/admin/ckfinder/userfiles/files/zunazesokobozefu.pdfIn PDF document text
    • http://traslochimontalto.it/userfiles/files/30898634227.pdfIn PDF document text
    • https://mls.lighting/wp-content/plugins/super-forms/uploads/php/files/4f3827ceb2b5eaa893a841fe316e4de6/vozokupifirevolenun.pdfIn PDF document text
    • https://aartipalette.com/userfiles/file/lavawigukubotidatat.pdfIn PDF document text
    • https://torrentclub.vip/wp-content/plugins/super-forms/uploads/php/files/9r9nct4gt23uqd48b37feaakl8/nowajipozigawukig.pdfIn PDF document text
    • https://mfdesign.hu/files/file/96562002721.pdfIn PDF document text
    • https://wecafephuket.com/wp-content/plugins/super-forms/uploads/php/files/6q0blhn53olosil65j7gqf2vi1/vodumoxevo.pdfIn PDF document text
    • https://windfreeklima.com/upload/ckfinder/files/87615701860.pdfIn PDF document text
    • https://www.davinci.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160a065dd24cf2---monew.pdfIn PDF document text
    • https://ladangmimpi.com/contents//files/58887696255.pdfIn PDF document text
    • https://familienbilstrup.dk/userfiles/file/roferanavaminulikukik.pdfIn PDF document text
    • http://jungvassar.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/jutuvidogu.pdfIn PDF document text
    • http://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/a61fa8e0e402a06f3c20e8ce6176ed9d/nefadupudimorarubuz.pdfIn PDF document text
    • https://veritiesinstitute.com/wp-content/plugins/super-forms/uploads/php/files/d8dacfcdc59b64aae422c60ce38e34f0/rilakugefusubo.pdfIn PDF document text
    • http://sip7.online/wp-content/plugins/super-forms/uploads/php/files/2ee49a4909ba6b7de362c2cfd614a46e/podajap.pdfIn PDF document text
    • http://www.jucadent.es/ckfinder/userfiles/files/72213268296.pdfIn PDF document text
    • http://pritchardreunion.com/clients/81409/File/tomijexep.pdfIn PDF document text
    • http://www.sec-ollivier-associes.fr/www/upload/file/takokatepazetuxulafidi.pdfIn PDF document text
    • https://mosoptagro.ru/wp-content/plugins/super-forms/uploads/php/files/d061e16937fb260065a3442ae5f2a7fb/41699275132.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_off0000d6fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6FC 10996 bytes
SHA-256: bece0291292cb33f5714c11ff414c489f978a7c907dc0aa115098d92fb20368d
font_01_sfnt_off0000f060.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF060 19352 bytes
SHA-256: fdc92285adc85577b047154c17efced1db0891b06fa96dc75b52e3849691e006
font_02_sfnt_off00012181.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12181 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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