Malicious PDF — malware analysis report

Static analysis result for SHA-256 896881d897499e64…

MALICIOUS

PDF

68.8 KB Created: 2021-09-26 08:47:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 4e243bbf41c7ccf31443090835aade33 SHA-1: 1d4f9a90458ce4644b50470f3fe23fa69a0fdf22 SHA-256: 896881d897499e64336025a3cde6ac9148c7d1268ae3bca75d206c1b42f40232
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed for malicious redirection. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://synerhu.ru/uplcv?utm_term=how+to+find+running+apps+on+android PDF link annotation
    • http://hcstonetw.com/uploads/files/202109090522542935.pdfIn PDF document text
    • http://fatamorgana.fr/uploads/assets/file/dotufopug.pdfIn PDF document text
    • http://barrarioservicos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1614e219ea9bef---rilinutunavoruda.pdfIn PDF document text
    • http://marta-galan.com/files/varios/file/rululexip.pdfIn PDF document text
    • https://viceda.com/userfiles/file/48474171341.pdfIn PDF document text
    • http://mtecommerce.it/public/news/file/powisasixad.pdfIn PDF document text
    • https://kalatranslation.co.uk/wp-content/plugins/super-forms/uploads/php/files/eafqhd3mnoa3ef766e8rkgg9gg/44078301586.pdfIn PDF document text
    • https://gdaniec.com/upload/files/wopudinaxi.pdfIn PDF document text
    • http://dcbestwings.com/uploads/files/11164392035.pdfIn PDF document text
    • https://pu.vienhung.com/webroot/img/files/89500526908.pdfIn PDF document text
    • http://stellar.ru/ckfinder/userfiles/files/sapaxamamavode.pdfIn PDF document text
    • http://falerisztika.hu/tmp/seselusezer.pdfIn PDF document text
    • http://vejwun.cz/images/47042008171.pdfIn PDF document text
    • https://mbzgogo.xyz/web/img/podborky/files/gosofaxumu.pdfIn PDF document text
    • http://pieseclimaauto.com/files/file/najepifomidosegopekubugij.pdfIn PDF document text
    • https://trsbarriersdirect.com/wp-content/plugins/super-forms/uploads/php/files/d43beru4foem6js2c3oh5hsesf/putivog.pdfIn PDF document text
    • https://studio45.live/wp-content/plugins/super-forms/uploads/php/files/07pg1faqjmv3e0oe4t1judcdj4/23029578501.pdfIn PDF document text
    • https://www.rapn.ru/ckfinder/userfiles/files/24451559632.pdfIn PDF document text
    • https://travelselection.us/wp-content/plugins/formcraft/file-upload/server/content/files/1614c459c4f491---81899494290.pdfIn PDF document text
    • http://sushrutproctology.org/ckfinder/userfiles/files/45578065477.pdfIn PDF document text
    • https://aadhaarretail.com/administrator/imagetemp/file/72939704842.pdfIn PDF document text
    • https://kltccompany.com/ckfinder/userfiles/files/newizunusevi.pdfIn PDF document text
    • http://nedvizhimost-v-sharm-el-sheikhe.ru/uploads/files/25809613924.pdfIn PDF document text
    • http://dalnoboy.net/data/filestorage/upload/files/fuwagirazojedotijo.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_off0000af68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF68 15000 bytes
SHA-256: 8d424fb2f947220b094094985c047f3571674844fd1f5fd9f82bbde33fb803da
font_01_sfnt_off0000d53d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD53D 10672 bytes
SHA-256: 65065bdbc1850a6a5dbd51b2b65b0c80064a2ad37734b92cc92cdec529e2531b
font_02_sfnt_off0000ed99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED99 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.