Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0c3d9e34067a8e9…

MALICIOUS

PDF

72.8 KB Created: 2021-09-08 02:20:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-18
MD5: 15b841b58737e43085fa9794707f9d85 SHA-1: 7e0effcd70a6f608651dc2808b8cfdeae9cdf8fd SHA-256: f0c3d9e34067a8e9d2782436f23ff5575967cf99ce9df3cf1c211f6c305c13eb
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to compromised or potentially disposable hosting domains, indicating a link farm designed to lure users to malicious content. The ClamAV detection and ML classifier strongly suggest a phishing or trojan distribution intent. No scripts were extracted, but the structure and URL patterns are consistent with phishing lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9915

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://pakianco.ir/data/image/uploads/news/files/32970420408.pdf In PDF document text
    • http://appinaris.net/ckfinder/userfiles/publics/files/xegogiliputut.pdfIn PDF document text
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/160ba52d7c30a4---37858169845.pdfIn PDF document text
    • http://architects-desk.com/uploadsfile/wujasizonuw.pdfIn PDF document text
    • https://allcreaturesinc.com/files/files/gutelobilitilewugokaniru.pdfIn PDF document text
    • https://annjulieskarpmo.com/userfiles/file/70963455512.pdfIn PDF document text
    • http://halvani.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bbeeb295752---dopeloxegopidibupovupebo.pdfIn PDF document text
    • http://unicorn-furnitures.com/d/files/nidozeguw.pdfIn PDF document text
    • http://www.puhito.hu/uploads/56239449994.pdfIn PDF document text
    • https://robert-zauer.cz/userfiles/file/89917749475.pdfIn PDF document text
    • https://estidevelopers.com/wp-content/plugins/super-forms/uploads/php/files/04a30d1677f1c06e4dd4a5ab112d507c/24716106729.pdfIn PDF document text
    • http://csc0516.com/userfiles/file/20210620183440_filoz2.pdfIn PDF document text
    • https://espritgt.com/userfiles/file/62413047241.pdfIn PDF document text
    • https://macleanpinesdrivingschool.com.au/wp-content/plugins/super-forms/uploads/php/files/57fc59a5d6e814588f7f7d32f94eca72/nerejixer.pdfIn PDF document text
    • http://capesociety.ca/uploads/files/ginulo.pdfIn PDF document text
    • http://mid-europe-ex.com/images/blog//file/49304787140.pdfIn PDF document text
    • https://dtcprojects.com.au/wp-content/plugins/super-forms/uploads/php/files/4g5b1rsohupu5slfka13aauiki/zazulutugefagiwi.pdfIn PDF document text
    • http://xn----8sbaqfskngn1qi.xn--p1ai/userfiles/file/72753940675.pdfIn PDF document text
    • http://www.stratcareerservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b302dabb6d2---17955591664.pdfIn PDF document text
    • https://www.sesc-am.com.br/Selecao/ckfinder/files/42663620378.pdfIn PDF document text
    • http://www.rlktechniek.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16131c646b5217---3223070847.pdfIn PDF document text
    • https://personalloan2u.com/wp-content/plugins/super-forms/uploads/php/files/af9f8dfddb147b6eeb39fb853c279e44/94368097475.pdfIn PDF document text
    • https://revapackers.com/wp-content/plugins/super-forms/uploads/php/files/g8pbf4qqirs9odpq50rpjbop8m/74341334588.pdfIn PDF document text
    • http://bilagroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075bf5df2ebf---dazitijivobonuzatojasu.pdfIn PDF document text
    • http://aibasavar.edu.bd/app/webroot/ckfinder/userfiles/files/fojetosuzilejera.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=esterilizacion+desinfeccion+y+antisepsia+pdfPDF link annotation
    • https://bxthirteen.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/348cdcc5736364a198835bc673509f02/jewupobevenadi.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_off0000bdbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBDBB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d5d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5D2 10772 bytes
SHA-256: 23c9c84939f99b192f5d4f1259397b0f2b0cd3744e90858e74a7498b8677c9d2
font_02_sfnt_off0000eec9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEC9 15488 bytes
SHA-256: 7093cf0e33eb43cc96622924c9ae8142ec4ca9d814ea4566c8d924d78cbe8049

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