Malicious PDF — malware analysis report

Static analysis result for SHA-256 64f5d7a5b3923bc0…

MALICIOUS

PDF

69.9 KB Created: 2021-09-11 16:10:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 80f6ebf77098c08651fd4ff1e7a78d0f SHA-1: d1cc0500a36df3fc05aafd3a4b02c97a3928e395 SHA-256: 64f5d7a5b3923bc0e74fe84bb1ad382249539d27538ef8d635aba6cde93f3ae4
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript, which is often used to redirect users to malicious websites. The heuristics indicate it functions as a link farm, with multiple URLs pointing to compromised or disposable hosting, suggesting an attempt to distribute malware or conduct phishing. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://osayit.com/images/file/83123957056.pdf In PDF document text
    • https://hawkseyetravels.com/assets/ckfinder/userfiles/files/59149429400.pdfIn PDF document text
    • https://copab.tn/216mag.svn/uploads/files/60370964756.pdfIn PDF document text
    • http://bilagroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613682ec97fe6---bifiwoz.pdfIn PDF document text
    • https://foodvellythailand.com/upload/files/46396324812.pdfIn PDF document text
    • http://pokewaveanaheim.com/uploads/files/xerekowezugej.pdfIn PDF document text
    • http://bonfiremadigan.com/uploads/fckeditor/file/gepokumoxiwafilisukodew.pdfIn PDF document text
    • https://inchirieriavioane.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16136ff0756738---50799083557.pdfIn PDF document text
    • http://chono.mn/uploads/userfiles/files/gupujabi.pdfIn PDF document text
    • http://garage-ys.info/js/upload/files/weliko.pdfIn PDF document text
    • http://krajinar.cz/soubory/files/mexebevifagokusig.pdfIn PDF document text
    • http://es-umzuege-transporte.de/wp-content/plugins/super-forms/uploads/php/files/d78b46dc2929a8b869743ad6f63f8c24/xebujafurakanamimejasaz.pdfIn PDF document text
    • https://rm-parketi.si/uploads/gojagopif.pdfIn PDF document text
    • https://frasertechno.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613206294713f---wazegigosakasaxep.pdfIn PDF document text
    • http://h04ydivan.ru/userfiles/file/mugurunak.pdfIn PDF document text
    • https://partroyfuneralhome.com/partroy/assets/file/getutofajababavaboniba.pdfIn PDF document text
    • https://sunridgecorp.com/uploads/files/202109070324205163.pdfIn PDF document text
    • https://oferta.lt/i/File/38396734426.pdfIn PDF document text
    • https://sdudyogtechnologies.in/ckfinder/userfiles/files/rurutifusubepevidubi.pdfIn PDF document text
    • http://kowalstwwo.pl/public/cms/images/file/40170864284.pdfIn PDF document text
    • http://www.peritaonline.es/ckfinder/userfiles/files/lodoveravujulaganuf.pdfIn PDF document text
    • http://elma-itc.ru/!upload/files/38234566218.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=raspberry+pi+zero+wifi+hackPDF link annotation
    • 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b123.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB123 15512 bytes
SHA-256: d881d539cf833817121263a8cbae878bb01af7d2212c94d01daa161d5cf7a9ca
font_01_sfnt_off0000d88e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD88E 10868 bytes
SHA-256: 99c938760d658fd47634efcaae4dd53d80df450790e10731e3f4b0040372e159
font_02_sfnt_off0000f1c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1C2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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