Malicious PDF — malware analysis report

Static analysis result for SHA-256 48c32bc69d7edb1d…

MALICIOUS

PDF

74.9 KB Created: 2021-07-26 07:09:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: 7bde201da3b302d4a9cb90181ce61871 SHA-1: b19edf302e1811ee0d783e99a177b71eb454cef5 SHA-256: 48c32bc69d7edb1d359b6bf84b4d90c00acea937e8e0f160ffb4eb9b2f9ff3a8
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is often used to exploit vulnerabilities or redirect users to malicious sites. The presence of multiple links pointing to compromised WordPress upload directories and other disposable hosting further suggests a phishing or malware distribution attempt. ClamAV detection as 'Pdf.Phishing.Trojan' reinforces this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5499

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.
  • 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
  • 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://gaskinfamilyreunion.com/clients/b/b7/b798c9f9e2af69c3a5b950a06e4ade8e/File/menivapubalesakov.pdf In PDF document text
    • http://www.rify.us/cms-uploads/files/62702397403.pdfIn PDF document text
    • https://christianklein.eu/Quansis/ckfinder/userfiles/files/61178635925.pdfIn PDF document text
    • http://nguoigiupviec99.com/webroot/img/files/5089582394.pdfIn PDF document text
    • http://emmanuelmissionarybaptist.com/clients/74938/File/65009421886.pdfIn PDF document text
    • http://yuseigachi.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1606e5bc1b8a96---30214536961.pdfIn PDF document text
    • http://papinchess.ru/userfiles/file/90640887620.pdfIn PDF document text
    • http://nhasachnguyenvancu.com/Images_upload/files/89688482107.pdfIn PDF document text
    • http://kasargod.net/uploads/file/15817724329.pdfIn PDF document text
    • http://xn--franzsischebulldoggen-lec.eu/userfiles/file/77173717029.pdfIn PDF document text
    • https://heritagelogs.com/wp-content/plugins/super-forms/uploads/php/files/7bffignobgcvesf03asc60jc6p/9337413380.pdfIn PDF document text
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/iqn1bciohdphejqcaujl929f24/70943390314.pdfIn PDF document text
    • http://www.moteco.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607f3ccc86406---sadozajoradewip.pdfIn PDF document text
    • https://travelselection.us/wp-content/plugins/formcraft/file-upload/server/content/files/160ac5984e8144---bowipiboxudeboforijimufa.pdfIn PDF document text
    • https://allcreaturesinc.com/files/files/dikovojidoguka.pdfIn PDF document text
    • http://www.suffaheducation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b43ae052b5---famuvi.pdfIn PDF document text
    • http://c2r-auto.com/uploadfiles/file/2021052623550273499.pdfIn PDF document text
    • https://thaiahpa.com/flash/files/69021528733.pdfIn PDF document text
    • https://www.frontierexim.com/wp-content/plugins/super-forms/uploads/php/files/7ro8khfgkvs8irnb5e8rhvmh07/xaparize.pdfIn PDF document text
    • https://transcendenceit.com/wp-content/plugins/super-forms/uploads/php/files/0d85aff0edfbaddc37b6f09b9b838fb0/jikixejozito.pdfIn PDF document text
    • http://stellarp.com/userfiles/files/gowesegojiwafo.pdfIn PDF document text
    • http://speed-r.com/js/upload/files/67592807599.pdfIn PDF document text
    • http://www.norestim.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160ac0e2264c6a---vixideraxip.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=best+picture+settings+for+samsung+4k+tv+series+7+tu7000PDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e767.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE767 17036 bytes
SHA-256: 9025a3eec350c0e423b4fe7a433224c95882feb5ff1f78bfb675b313c8fe7d75
font_01_sfnt_off000113f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113F7 11340 bytes
SHA-256: f78ec8f8bbbc7a02d4eecab1fcab82089876d8a89e620b37d869b6a53ebd9a59

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