Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ab7475afa4c8d82…

MALICIOUS

PDF

212.3 KB Created: 2021-06-27 04:34:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: d8bc988f2fb3f3c5ce5cf526bb5879c5 SHA-1: fcd88477c2ba6a1b1ad9fc1685e36c8d3b701aa3 SHA-256: 6ab7475afa4c8d8255d7b2457f5cf3043c60e8d335ff033e0af21b7a83b87472
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm pointing to compromised WordPress upload storage and an SEO redirector, suggesting a phishing or malware distribution scheme. Although no scripts were extracted, the presence of multiple embedded URLs and the nature of the heuristics point towards a phishing attack aiming to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9509

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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.
  • 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.andrecampbell.ca/wp-content/plugins/super-forms/uploads/php/files/5ec0ff22a5fec1c8f8b64898242d5310/xelukekenufizebemubo.pdf In PDF document text
    • https://transport-vehicules.fr/userfiles/file/direli.pdfIn PDF document text
    • http://taborcapitalpayment.com/clients/d/d0/d0a3925ee25d0adc8806453b18bccccc/File/zelawotijanilamo.pdfIn PDF document text
    • https://wcdt.co.th/wp-content/plugins/super-forms/uploads/php/files/f2kr7sva1cbti4a6ud89r5bn34/97507530771.pdfIn PDF document text
    • https://amursvoidom.ru/media/files/61349690867.pdfIn PDF document text
    • http://www.ibadirect.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ac257130f3---jorikamazatopuzines.pdfIn PDF document text
    • https://www.pennlighting.com/wp-content/plugins/super-forms/uploads/php/files/0018a1e09bd8f26784993e41ea26d922/29984300536.pdfIn PDF document text
    • https://toptenstudy.com/upload/files/BodyFile__60B1FCC1E83A1.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607917a1bcf4e---76727236116.pdfIn PDF document text
    • https://a2designbg.com/userfiles/file/71862678618.pdfIn PDF document text
    • https://baconbites.com/wp-content/plugins/super-forms/uploads/php/files/dsd51fkcpoq2qaee3ekma12aj5/lusowadusuluzofakurof.pdfIn PDF document text
    • http://amoy-art.com/Upload/file/somiwe.pdfIn PDF document text
    • http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160a7a5902d4d8---68026047839.pdfIn PDF document text
    • http://gostium.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a3df16a4b4---74277991161.pdfIn PDF document text
    • http://www.mondzorgvesa-voorschoten.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b79559af83d---79294234784.pdfIn PDF document text
    • https://vaytieudungtragop.com.vn/wp-content/plugins/super-forms/uploads/php/files/3cr9v1uqdidglm58jsbeim82g2/woderumasada.pdfIn PDF document text
    • http://dichvugiayphep.net/hinhanh_fckeditor/file/20322866186.pdfIn PDF document text
    • http://becro-plast.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160c382e65192e---16003172542.pdfIn PDF document text
    • https://takiminsahada.com/wp-content/plugins/super-forms/uploads/php/files/e4j28a6k3945hngsh4q5p6oiue/lazukoxin.pdfIn PDF document text
    • https://livingcircles.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160bd97c5ba793---sozijenugavegalejawosoni.pdfIn PDF document text
    • https://saftanton.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1607377d7c7079---sibibun.pdfIn PDF document text
    • https://gloriouz.in/ckfinder/userfiles/files/63115211477.pdfIn PDF document text
    • http://mspchicagolaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/tabewufekolenosovefu.pdfIn PDF document text
    • http://ahcxdq.com/uploads/file/302358408126.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=death+on+a+pale+horsePDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0002ba50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2BA50 32680 bytes
SHA-256: eaa920eefd2df31972476dfad5b97c5592eba2f6a395d6cc3cd664c78c38495f
font_01_sfnt_off0002fded.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FDED 16232 bytes
SHA-256: af293b2b60dc5e826b00d8953dd18f37a59bdd939ad7d7593537948814e7f124
font_02_sfnt_off000313ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x313AE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00032bc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x32BC5 10256 bytes
SHA-256: b9f84aa9bbb41f81bbfa5bcfafdc2d689f4cc9d923beae3ab101cd16f1127f3b