Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee29ffd8ea6c27db…

MALICIOUS

PDF

85.1 KB Created: 2021-09-05 15:35:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: ebb8f3b92edc10e0cee353e2823742c8 SHA-1: bc58c5f728bd6e5a290d898b375d6b5a88170321 SHA-256: ee29ffd8ea6c27db2cd704c14de7564f31f977628af05f2992b7420637f8c9a2
164 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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 http://diagonal.org.ar/wp-content/plugins/formcraft/file-upload/server/content/files/16088782f0195e---xupabuwupidejuwoma.pdf In PDF document text
    • http://www.asslar.de/downloads/tipikozowozarabutoget.pdfIn PDF document text
    • https://ooo-kenk.ru/userfiles/file/21761022673.pdfIn PDF document text
    • http://baugeraeteverleih.de/benutzerdateien/53220817210.pdfIn PDF document text
    • https://malimbe.africa/wp-content/plugins/super-forms/uploads/php/files/cf5e282ee849cd24ac5b16443dcf5463/22138177106.pdfIn PDF document text
    • http://cathugo.de/res/wysiwyg/file/musigomoremazapakefa.pdfIn PDF document text
    • http://eros-arena.com/eros/userfiles/file/2353694507.pdfIn PDF document text
    • https://nullemont.fr/nullemont/ckfinder/userfiles/files/saxoxuduravogimufeve.pdfIn PDF document text
    • http://premiumresourcing.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085cc30cde44---wafijudutaweraresifojeto.pdfIn PDF document text
    • http://bigcool.net/webroot/img/files/fikokaduvekiwokibifarenug.pdfIn PDF document text
    • https://oteaexpert.fr/cite_imgs/file/44184919545.pdfIn PDF document text
    • http://thanhlamresort.vn/wp-content/plugins/formcraft/file-upload/server/content/files/16081d778b8227---64824123204.pdfIn PDF document text
    • http://www.kevinbrooks.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160839554a678f---58629456048.pdfIn PDF document text
    • http://veivel.com/userfiles/file/76679367390.pdfIn PDF document text
    • https://bladmedyczny24.pl/wp-content/plugins/super-forms/uploads/php/files/0fc33136759a0bdaa257b46c01def681/jumalowefafalefusuxoros.pdfIn PDF document text
    • http://2015.letnifestiwal.pl/ckfinder/userfiles/files/tazidifozibuwer.pdfIn PDF document text
    • http://geoman.cz/data/file/wigexafitojosikob.pdfIn PDF document text
    • https://premiumvipbusiness.com/wp-content/plugins/super-forms/uploads/php/files/18c2523305e57e057fc84805ae528b00/57432682278.pdfIn PDF document text
    • https://nomaquito-travel.com/editor-images/74665032523.pdfIn PDF document text
    • http://tweedehandswikkelaar.nl/app/webroot/files/userfiles/files/wibifibuwekefaliwipenaz.pdfIn PDF document text
    • http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f4826d658e6---13629350814.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=intermittent+explosive+disorder+screening+questionnaire+pdfPDF link annotation
    • http://lovewhereyoulv.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/3c370c1a9ca4ba200f2de8a0873aaf9c/gexosopubutegurew.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_off0000e798.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE798 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ffaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFAA 17464 bytes
SHA-256: ee75055afae8cc2707ec2206077c046848d7744acc45077141f533b11b84c20b
font_02_sfnt_off00012c88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C88 11328 bytes
SHA-256: 361a26e08921059bdfb7739c5b7392b876166a3a6ab1d483092cfe2b1cd2af2d

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