Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7e93619fa4557cc…

MALICIOUS

PDF

79.9 KB Created: 2021-09-17 02:04:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: eb5836891349e1c42cca997e4f6bc9a4 SHA-1: 5fba93cddc61cd0ab1fbef6389fb192bd6dd2d3d SHA-256: d7e93619fa4557ccbb92236c22cd34daa9c7202fb13dfa0d750b13dfdb067610
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to multiple domains, many of which are hosted on compromised CMS uploads or disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document designed to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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 http://carneslaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/82160435240.pdf In PDF document text
    • http://abwalabamaave.com/uploads/files/36888921116.pdfIn PDF document text
    • https://aicpwdosaeast.com/ckfinder/userfiles/files/nagukujorirapakixoj.pdfIn PDF document text
    • http://osullivanspressurewashing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613847b29a84f---28100542884.pdfIn PDF document text
    • https://unaizahic.com/Files/files/13363330705.pdfIn PDF document text
    • http://hongphuc.vn/userfiles/file/25817366484.pdfIn PDF document text
    • https://labelmarket.eu/data/file/pixofexeganimekametofup.pdfIn PDF document text
    • http://themultifold.com/wp-content/plugins/super-forms/uploads/php/files/ir10g36gkp2hdfeh9dff2j5421/62098265401.pdfIn PDF document text
    • http://xn--9n2bn9mz3aba29g44r4o0a.kr/fckeditor/userfiles/image/nolizizopa.pdfIn PDF document text
    • http://www.anaja-inter.org/public/file/jiwoxadukafeluzixowa.pdfIn PDF document text
    • https://dukupahit.com/contents/files/7488648184.pdfIn PDF document text
    • http://geoplan.su/userfiles/file/17255978506.pdfIn PDF document text
    • http://coomargroup.com/ckfinder/userfiles/files/32157875734.pdfIn PDF document text
    • http://tuttotop.com/userfiles/files/xivamul.pdfIn PDF document text
    • http://rsentco.com/upload/file/80223133893.pdfIn PDF document text
    • https://hsse.cl/files/xikilobaka.pdfIn PDF document text
    • http://lamekatus.com/uploads/ckeditor/files/pojanagelab.pdfIn PDF document text
    • http://iucecb.com/files/file/buzinisubusufozet.pdfIn PDF document text
    • http://www.gieskestukadoors.nl/ckfinder/files/files/57127194505.pdfIn PDF document text
    • https://littleedupark.com/ckfinder/userfiles/files/kikidafitupu.pdfIn PDF document text
    • https://grnca.org/img/files/files/13913397008.pdfIn PDF document text
    • http://maility.pl/_ADRESuserfiles/file/5565836950.pdfIn PDF document text
    • http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/161354e5418473---bunawigeja.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=how+to+clear+a+blurry+picture+on+androidPDF 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_off0000d376.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD376 10772 bytes
SHA-256: 78f212e185b66ad1be4a78369079f779ef0b695dc66519b30a4b5478685519be
font_01_sfnt_off0000ec27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC27 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010439.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10439 17864 bytes
SHA-256: ecba5044053717a988f5e8103453c143e17cfa826ea38accb161aa866fa7f43c