Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a2307b4bfa6ea0a…

MALICIOUS

PDF

81.0 KB Created: 2021-08-31 04:13:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-02
MD5: d68f92b2b07f1ad45c3930f012455a1b SHA-1: 6e60248634dbb3617ed66cf18b8a2d17627e22b5 SHA-256: 0a2307b4bfa6ea0aeb89eacd42eee7b6c74f6ca6f9bc7d073edf54e5e1a10f72
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

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. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://xn----8sbaavnccwq4am.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/61e82a5711c295901d9817ce660baec9/44611023842.pdf In PDF document text
    • http://tieclangman.com/Images_upload/files/4243980256.pdfIn PDF document text
    • https://marijina-romarska-pot.si/userfiles/file/gunalerepowo.pdfIn PDF document text
    • http://studiogiovannone.com/userfiles/files/fulamar.pdfIn PDF document text
    • https://gpuhub.net/wp-content/plugins/super-forms/uploads/php/files/qhldcm8c4r0esvqe5mug2inm70/zazubewozekaxux.pdfIn PDF document text
    • http://zonweringnederland.com/ckfinder/userfiles/files/japolokisanide.pdfIn PDF document text
    • http://lagerunda.it/public/upload/file/dafixotoxuxitidafem.pdfIn PDF document text
    • https://linhquan-group.com/upload/ck/files/gapunaxo.pdfIn PDF document text
    • http://opusincertum.it/userfiles/files/fujupizidekufodat.pdfIn PDF document text
    • http://www.studiolegalefusimorelli.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b1f9e840a2---66784113988.pdfIn PDF document text
    • http://sooclose.eu/upload/File/55084170157.pdfIn PDF document text
    • http://kengosushionlineorder.com/uploads/files/fiwamobasofituxi.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d7868c79299---31987709810.pdfIn PDF document text
    • http://monterroso-construpuntos.com/campannas/file/tobobumevelosizi.pdfIn PDF document text
    • http://zpb-maciejewski.pl/upload/fck/file/9668654650.pdfIn PDF document text
    • http://podiummoda.ru/userfiles/file/sumasukagekagaxigipadag.pdfIn PDF document text
    • http://gwhs79.com/clients/867100/File/27661452053.pdfIn PDF document text
    • http://www.hangmandigital.com/files/file/nozuwolovebawotobuv.pdfIn PDF document text
    • http://vanxuantravel.com/upload/files/reberekufuxoxiduputemul.pdfIn PDF document text
    • http://serendipityorlando.com/wp-content/plugins/formcraft/file-upload/server/content/files/160acaaa1ddb60---684613188.pdfIn PDF document text
    • https://seroinstitute.com/wp-content/plugins/super-forms/uploads/php/files/7998c81ca50b64c298a2c439676b6612/xabefazeminoxigudovujadi.pdfIn PDF document text
    • http://www.hj-bouwt.be/wp-content/plugins/formcraft/file-upload/server/content/files/160be917c839d3---54739954866.pdfIn PDF document text
    • https://resulgame.com/calisma2/files/uploads/votisugun.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=decomposition+reaction+chemistry+definitionPDF 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_off0000d61b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD61B 17936 bytes
SHA-256: bbd8f5e39a080ff52f356b26f166f3a0fab37bacb2ff9b4f63e9e294f046320e
font_01_sfnt_off00010491.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10491 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011ca8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CA8 10956 bytes
SHA-256: 131450ee5b9c5578994388b32f9be0a57514cf3799976d74dc81d55d766bfad0

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