Malicious PDF — malware analysis report

Static analysis result for SHA-256 06dadbf2565bb74e…

MALICIOUS

PDF

76.2 KB Created: 2021-09-07 09:55:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: b81d568d81e110b957762d6db8796fbe SHA-1: dbfd22826c64bd2c9da4da7cb5961e025f003466 SHA-256: 06dadbf2565bb74edd0060cd648771218975a882d8d51f46f71f6f6513ca2558
156 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many pointing to potentially compromised CMS upload directories or disposable hosting, suggesting a link farm designed to redirect users. The presence of these URLs and the overall detection strongly suggests this PDF is used for phishing or distributing further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9827

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://mimpishio2bet.com/contents//files/magerod.pdf In PDF document text
    • https://drjou-vc.com/upload/files/64101081510.pdfIn PDF document text
    • http://mqskin.com/luutru/files/delerum.pdfIn PDF document text
    • http://www.hollyskauaicondo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c903e7e00b---59951513319.pdfIn PDF document text
    • http://lowchens.org/userfiles/file/tufodizu.pdfIn PDF document text
    • https://www.harasportcenter.com/wp-content/plugins/super-forms/uploads/php/files/oglavnlv9euvv6r2trh3i6ir2l/98240238910.pdfIn PDF document text
    • http://plenaadoracao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160bf57b7ab666---26409175403.pdfIn PDF document text
    • https://oneremote.ru/wp-content/plugins/super-forms/uploads/php/files/2b24d52a605a0f3ede314cfb5c4734ce/levununogezuvekit.pdfIn PDF document text
    • http://www.chicagoalphas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ce66bd9deb5---62246058909.pdfIn PDF document text
    • http://zzfcw.com/file/fkimg/file/fojumemonoximabato.pdfIn PDF document text
    • http://verkoop-je-wagen.be/wp-content/plugins/formcraft/file-upload/server/content/files/160c1d14052ab1---44782474343.pdfIn PDF document text
    • https://tkpmission.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b6360378149---folawikovux.pdfIn PDF document text
    • https://nnt52.ru/userfiles/file/55146299451.pdfIn PDF document text
    • http://rickgrisolia.com/userfiles/files/famutetalop.pdfIn PDF document text
    • http://kfnmdg.com/upfolder/e/files/20210619065822.pdfIn PDF document text
    • http://jhsclassof63.com/clients/c/c8/c8cc7cee7579ddcd469b669c0eb172d8/File/97453186472.pdfIn PDF document text
    • http://penoplex24.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16099c7a9a8d8f---tozalol.pdfIn PDF document text
    • https://spaslask.pl/wp-content/plugins/super-forms/uploads/php/files/qj2s65l4dek3dh8ltmo5vsmnaq/banidofadozoxo.pdfIn PDF document text
    • https://earplighting.com/wp-content/plugins/super-forms/uploads/php/files/5d3d62fc7d1f5d2fc3ee170dbe7d3555/88208734579.pdfIn PDF document text
    • https://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bdfad822cae---82724482331.pdfIn PDF document text
    • https://hosvagyok.hu/userfiles/file/lavubofonekugem.pdfIn PDF document text
    • https://www.temsilcisitesi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160874520476c1---37970805109.pdfIn PDF document text
    • https://allcondosales.rodeodrivecondosale.com/userfiles/files/supezojuwejegebofe.pdfIn PDF document text
    • http://mail.me.ntou.edu.tw/ckfinder/userfiles/files/20210720_044555.pdfIn PDF document text
    • http://www.syrahresources.com.au/application/third_party/ckfinder/userfiles/files/rovirije.pdfIn PDF document text
    • http://kondicionery-noginsk.ru/upload_picture/file/32088458058.pdfIn PDF document text
    • https://grupo-kayros.com/userfiles/file/jekoludelurukefusi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=english+vocabulary+games+for+adults+pdfPDF 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_off0000c32d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC32D 11468 bytes
SHA-256: 5907b0e9b925fae62154408d8504b635ef7cccc1fd41e21b539356ff30aa9a07
font_01_sfnt_off0000ddb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDB8 17364 bytes
SHA-256: 2675462e8b2f330e15b4dcf04c0a980abdc631973be9c1c0f86b39726c4be94a
font_02_sfnt_off00010acb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10ACB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1