Malicious PDF — malware analysis report

Static analysis result for SHA-256 9326fd49e152b282…

MALICIOUS

PDF

81.6 KB Created: 2021-09-07 14:48:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: b7c065e1dfa91a0e3e6536c46e0f8aba SHA-1: dd4cb6bbaa2415c6dca30e848f254dfa092ef665 SHA-256: 9326fd49e152b282deca09f3c3bf792b41ebb164856cd0dbea7a26e3bc02b6fc
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was identified as malicious by a ML classifier and ClamAV, indicating it's a phishing or trojan distribution attempt. It functions as a link farm, directing users to numerous compromised websites that host further malicious content, likely for phishing or malware distribution. The presence of external URIs and link farms on potentially compromised CMS uploads points to a coordinated effort to distribute malicious files.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607830d315075---jaxoxipuzewatotidu.pdf In PDF document text
    • http://cellesekorea.com/ckupload/files/612920702.pdfIn PDF document text
    • http://al-bandak.com/userfiles/file/62924235760.pdfIn PDF document text
    • http://www.fullertherapy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160906c20d3e8d---jogaxosalizusotolaneje.pdfIn PDF document text
    • http://lovesenergy.com/file/29041081568.pdfIn PDF document text
    • https://imagebeaute.fr/userfiles/file/tikanagirifonib.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160916d3f63715---74227053447.pdfIn PDF document text
    • https://ols.lighting/wp-content/plugins/super-forms/uploads/php/files/5709be99549600cb79e1093e9102d72a/rozineva.pdfIn PDF document text
    • http://rfychina.com/upfiles/files/16271768125620.pdfIn PDF document text
    • https://cffcommunications.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/160f55e646f2f4---80041353253.pdfIn PDF document text
    • http://x04ydivan.ru/userfiles/file/zepukiruz.pdfIn PDF document text
    • http://ankaraeksioglu.com/resimler/files/71115697774.pdfIn PDF document text
    • http://ixtvs.de/_upload_bilder/_filemanager/file/82478146422.pdfIn PDF document text
    • https://monographie.com/ckfinder/userfiles/files/pigalavufuwi.pdfIn PDF document text
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/nnint84f3ppb0a4m4bkojuvm51/wuzawolavumemaladilolomem.pdfIn PDF document text
    • http://warehousetraining.ie/images/91593125737.pdfIn PDF document text
    • https://ritascreation.com/userfiles/file/zowifux.pdfIn PDF document text
    • http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9079541174---manaxitama.pdfIn PDF document text
    • http://nuitsdartistes.eu/images/file/15815465251.pdfIn PDF document text
    • http://amako-ra.com/wp-content/plugins/super-forms/uploads/php/files/ae87ede1a10043909dac3b96d27e94f5/vupotijivegewovudapixev.pdfIn PDF document text
    • https://bwawarszawa.pl/upload/file/25627512242.pdfIn PDF document text
    • http://lavera.it/wp-content/plugins/formcraft/file-upload/server/content/files/160e585a839d34---zusanug.pdfIn PDF document text
    • https://hightechrustremovers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16090f6f92a44a---maganijarisisupora.pdfIn PDF document text
    • http://vaonhaphatphap.com/images/uploads/files/pepisupetuzusuxajuwote.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=three.js+cookbook+pdfPDF 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d983.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD983 18088 bytes
SHA-256: 26beca31928eb6d0569576b79e69609d17f4d7c3d642d4190c7ea26f924140d4
font_01_sfnt_off00010841.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10841 10608 bytes
SHA-256: 63ed81ce978ffc7fdc44c5f9ed7cddc1d9bf97f6503337c1c6784471b3c410c5
font_02_sfnt_off0001206a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1206A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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