Malicious PDF — malware analysis report

Static analysis result for SHA-256 07af0a101e46b566…

MALICIOUS

PDF

81.2 KB Created: 2021-09-15 16:58:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: b9f84b0e623165b840c50bec6cf956e9 SHA-1: bbbcd4c2a9451b79bb17895635cfa162bb5c9a3b SHA-256: 07af0a101e46b566a5ba39a8c1cdac3995ba12017e8acf46132f8024ff307143
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links, many of which point to compromised websites or disposable hosting, indicative of a link farm used for phishing or distributing further malware. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or trojan delivery via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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://dmshospital.com/mm_engg/files/vunebo.pdf In PDF document text
    • https://organicfertilizerproduction.com/d/files/zufumusagova.pdfIn PDF document text
    • http://kennyre.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614024209874f---99388484664.pdfIn PDF document text
    • https://www.dynasil.com/wp-content/plugins/super-forms/uploads/php/files/aa30004a7407ed28692ac832fa7eeec7/59336291449.pdfIn PDF document text
    • https://godparents4tz.org/home/god/public_html/ckfinder/userfiles/files/50386840603.pdfIn PDF document text
    • https://burragebrothers.com/demo/jolie/beta/userfiles/files/rovixudi.pdfIn PDF document text
    • http://brucemayrockinstitute.com/assets/ckfinder/core/connector/php/uploads/files/dogevulibavosanen.pdfIn PDF document text
    • https://lexconsulting.ro/webroot/files/media/sesakesoxepexu.pdfIn PDF document text
    • https://www.kadinlarsitesi.org/wp-content/plugins/formcraft/file-upload/server/content/files/1613b6969efbeb---wizabanukirubajikamotogo.pdfIn PDF document text
    • http://partnerplus30.ru/images/fornews/files/1916379815.pdfIn PDF document text
    • https://wcfkenzi.com/ckfinder/userfiles/files/geladiterixedelowor.pdfIn PDF document text
    • https://styliststudios.com/imagesTE/file/muwizerawipapipon.pdfIn PDF document text
    • https://www.goldenplanet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1612fc70e44d37---vevaxunoraziw.pdfIn PDF document text
    • http://omniatel.it/wp-content/plugins/formcraft/file-upload/server/content/files/16140c60e0c799---xomutanevaj.pdfIn PDF document text
    • http://wonikquartz.com/upload/editor/file/1631453755.pdfIn PDF document text
    • https://gemma.lucien-sv.info/uploads/files/613c392b25a16.pdfIn PDF document text
    • https://livredart.com/ckfinder/userfiles/files/32841879882.pdfIn PDF document text
    • http://hoshitorionline.com/uploads/files/pajemol.pdfIn PDF document text
    • https://zenithservicos.com/userfiles/files/donafamigozakujeva.pdfIn PDF document text
    • https://nexusmediation.nl/files/bubeg.pdfIn PDF document text
    • https://www.hotel-palladium.gr/wp-content/plugins/super-forms/uploads/php/files/eh20frnuodrpqb14bfvk1snbc0/jisafif.pdfIn PDF document text
    • https://ecoinkworld.com/wp-content/plugins/super-forms/uploads/php/files/9b8f7eaeea9ad08fbedf0c61d9c880d8/woliribokikigemujufezov.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=zip+code+dasmaPDF 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_off0000d44f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD44F 19852 bytes
SHA-256: 963e6ffe9f3acf8884381e3663a743748f1fc0c6bc74e0a4a5caba9398af2e29
font_01_sfnt_off0001076f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1076F 10292 bytes
SHA-256: b2dbeb8ab6422244f8e7b8bc73241b882e47fd7af95756acec182103d4351bda
font_02_sfnt_off00011ea2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EA2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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