Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b242c94e8da9bd6…

MALICIOUS

PDF

92.9 KB Created: 2021-09-05 18:47:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 0d92051d948d6651cb99a776e8f66c3c SHA-1: 31876bb258bc2a2755dea7428137b2b072293790 SHA-256: 4b242c94e8da9bd60001041c830ca72d64ce55ca9c32eac045e04bd9bc207ea8
154 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. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or directing users to malicious content. The presence of link farms on disposable hosting and compromised CMS uploads further supports a malicious purpose.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8860

Heuristics 5

  • 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
  • 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://queure.ru/uplcv?utm_term=silverwood+theme+park+map+pdf PDF link annotation
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/31ddlegjl7lcbjjb62o4bun74r/43531126177.pdfIn PDF document text
    • http://arlingtonhigh1961.com/clients/e/ef/ef36f0800c0a5d5a0b00d5ecc8c3c6da/File/12300819725.pdfIn PDF document text
    • https://www.asahinadigital.com/wp-content/plugins/super-forms/uploads/php/files/19jd70vficlk1bn9j5g42ven97/mobobuwuvutabu.pdfIn PDF document text
    • http://cravaluos.com/ckfinder/userfiles/files/56788438304.pdfIn PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/7fghkffo4cug14l13c8ba25c42/lepebi.pdfIn PDF document text
    • https://formapolis.it/wp-content/plugins/super-forms/uploads/php/files/8781bd56b6f224aa3f1604eefd30f7f9/tafimubupexosenejuku.pdfIn PDF document text
    • https://readxyz.com/wp-content/plugins/super-forms/uploads/php/files/85d5b46af30a816be1cd4b2396fd09f1/mujoluvaxaxix.pdfIn PDF document text
    • http://373113.linker.tw/files/vegozerodademarex.pdfIn PDF document text
    • http://mertlakustika.cz/images/pages/file/xeguvenef.pdfIn PDF document text
    • http://www.viksexteriors.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094b5b4d01ff---22188866576.pdfIn PDF document text
    • https://www.c2commercial.com/wp-content/plugins/super-forms/uploads/php/files/b48280f64d58d1ae4b5d6709fba951df/kinupitefuzekotatonax.pdfIn PDF document text
    • https://finestblogger.de/wp-content/plugins/super-forms/uploads/php/files/nribi75683egri46pi4f0tqaqf/fipetipoj.pdfIn PDF document text
    • http://dothanhigh1970.com/clients/6/63/63ba8bdc6fdca46b25bb56d5732eafc9/File/zaruparalukadugabi.pdfIn PDF document text
    • https://vivekanandbawwa.com/userfiles/file/63521452361.pdfIn PDF document text
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/2ae935be99cbf6007b4a7f05f0a634ab/72971766215.pdfIn PDF document text
    • http://djarkitek.com/temp/vinney/HTML/userfiles/file/juzuwakaxugajefoxisi.pdfIn PDF document text
    • http://elitakhealing.com/ckfinder/userfiles/files/81992971682.pdfIn PDF document text
    • http://iwish-cosmetics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc5461a9c42---zulebibetesowux.pdfIn PDF document text
    • https://granitabrasive.com/editor_up/50482996936.pdfIn PDF document text
    • http://glassco.ca/clients/9/99/99aa1728c1dafa3cf8773a75727b87c9/File/xazuwodo.pdfIn PDF document text
    • https://chennothinterios.com/uploads/file/susotegosowemi.pdfIn PDF document text
    • https://daluxerealty.com/wp-content/plugins/super-forms/uploads/php/files/uam6u2p3h9077mhc47l8norjr1/roponewirotemez.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012f70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F70 19672 bytes
SHA-256: d2a1e97e59c506192098fa57a545cdbf1192e8b669121fb59d2fbfb30a1fc5c8

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