Malicious PDF — malware analysis report

Static analysis result for SHA-256 34e58d1b6dd408bf…

MALICIOUS

PDF

81.5 KB Created: 2021-09-12 02:01:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 6b62372b2be633a1ea1b7430990f3045 SHA-1: 6ade65498f9d378867e2d639b6e30e520b4f5dd8 SHA-256: 34e58d1b6dd408bfe286ef9a4245bdf3d7e77a6dedf529e37d7c3a2817592313
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external URIs and link farms hosted on potentially compromised or disposable domains, suggesting a phishing or malware distribution scheme. The presence of embedded URLs and the structure of the PDF point towards an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://wastran.ru/uplcv?utm_term=life+of+pi+movie+streaming PDF link annotation
    • https://www.ccps.mx/wp-content/plugins/super-forms/uploads/php/files/c742e0c7c6de5aef302914e996ae6b5c/16572409242.pdfIn PDF document text
    • http://pusheng168.com/uploadfiles/20210911222540.pdfIn PDF document text
    • https://centrorevisionimonregalese.it/file/budopakukunivup.pdfIn PDF document text
    • http://www.naturapreserved.com/wp-content/plugins/formcraft/file-upload/server/content/files/161372e1015905---32424755609.pdfIn PDF document text
    • https://festivalecolo.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1613d1d6dcc265---49814676751.pdfIn PDF document text
    • http://simsvizag.com/contentimages/file/bosivonalilomitilukap.pdfIn PDF document text
    • http://vsrru.ru/userfiles/file/56808594058.pdfIn PDF document text
    • http://alpinist.store/sribati/editor/uploadfiles/lomanibutewobavage.pdfIn PDF document text
    • http://studiorestagno.eu/userfiles/files/55052623896.pdfIn PDF document text
    • https://newdesert.pl/userfiles/file/sapawuratobefuladirisixap.pdfIn PDF document text
    • https://istanajp.com/contents/files/36031560575.pdfIn PDF document text
    • http://www.guaitoli.eng.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613d120f2c22c---jegabovefurovomilosi.pdfIn PDF document text
    • http://honderhotel.com/UploadFiles/FCKeditor/20210901143051.pdfIn PDF document text
    • http://pho32shabu.com/uploads/files/64601080830.pdfIn PDF document text
    • http://xahscw.com/userfiles/file/19581721445.pdfIn PDF document text
    • http://mellorymotors.ru/admin/ckfinder/userfiles/files/tagamavapelukezosapesun.pdfIn PDF document text
    • http://phuclocvienjsc.com/uploads/image/files/gaxubolozapuwuroz.pdfIn PDF document text
    • http://biondiairsystem.it/userfiles/files/dameboronaxu.pdfIn PDF document text
    • https://emons-verlag.com/testarea/cwsCMSlight/media/files/5839309055.pdfIn PDF document text
    • http://busangh.com/attfile/fckimg/file///2021090675420_702731060.pdfIn PDF document text
    • http://romanakladatelstvi.cz/userfiles/file/39570696067.pdfIn PDF document text
    • http://artattack-concerts.de/files/file/kobuxatevuzuv.pdfIn PDF document text
    • https://dpt-mh.com/uploads/news/files/kitovekoxa.pdfIn PDF document text
    • http://ivelinabozilova.com/userfiles/file/semofagaxadekepagikugeko.pdfIn PDF document text
    • http://www.ktgroup.co.uk/ckfinder/userfiles/files/90025525806.pdfIn PDF document text
    • 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_off0000d9de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9DE 10680 bytes
SHA-256: 96bf96bfd61aab7431e23997f6b798d04c0c1c7da228b7c78496f583212ec25b
font_01_sfnt_off0000f267.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF267 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010a79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A79 17880 bytes
SHA-256: ad41fa2b4662c03a774ddf52f9f0b57809451f195256773d3c14e7a90c5f7eeb

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