Malicious PDF — malware analysis report

Static analysis result for SHA-256 9daa6369f16f0555…

MALICIOUS

PDF

75.8 KB Created: 2021-07-17 19:35:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 1ff46b98f2151d56470b2b6c53c27df6 SHA-1: 3690c8f77cd467dd30c132807415a92f797f902e SHA-256: 9daa6369f16f0555d9557460db078760f5475cf27cae20fbfc98d6361ff4d257
156 Risk Score

Malware Insights

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

The file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. Heuristics reveal it functions as a link farm, with many URLs pointing to compromised WordPress sites and disposable hosting, suggesting a phishing or malware distribution scheme. The PDF itself contains garbled content, indicating it is not meant for human consumption but rather as a container for malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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 http://kurier48.pl/files/userfiles/file/33371572541.pdf In PDF document text
    • https://powermailer.in/userfiles/file/kexatifijutudenakas.pdfIn PDF document text
    • https://parisautotravel.com/wp-content/plugins/super-forms/uploads/php/files/jufploh0a7i8hgs23pos8pjuk5/62088095892.pdfIn PDF document text
    • https://www.heainc.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077e69dea03e---nefisojopubikule.pdfIn PDF document text
    • http://jncs.kr/page_data/file/20210705115035.pdfIn PDF document text
    • http://www.empresasdelimpeza.info/wp-content/plugins/formcraft/file-upload/server/content/files/1608e03c41492e---menilubalisirowag.pdfIn PDF document text
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a684fda7db3---45944316309.pdfIn PDF document text
    • http://954move.com/clients/4890/File/rejafolalalimateduloxo.pdfIn PDF document text
    • http://www.jindatunnel.com/up_files/file/mivuribu.pdfIn PDF document text
    • https://mytutr.com/wp-content/plugins/super-forms/uploads/php/files/2d6c7ed848e8fe2920eb5378d070a440/merewinadadodu.pdfIn PDF document text
    • http://trackeg.com/en/wp-content/plugins/formcraft/file-upload/server/content/files/1607152bfed26d---tibeximedowemetupotix.pdfIn PDF document text
    • https://deltaguvenlik.net/userfiles/file/lakizubibaradagepavaja.pdfIn PDF document text
    • https://remoteworkerclub.com/wp-content/plugins/super-forms/uploads/php/files/b1b7a055a89cf6023a2a0de4dea43c7e/40473841074.pdfIn PDF document text
    • https://accesoriosalmayor.com/images/userfiles/file/xawujasagonuzafadu.pdfIn PDF document text
    • https://sidexsideaudio.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8de487f221---kafidatodurogux.pdfIn PDF document text
    • http://radio-salsa.com/php/rs/filesupload/file/4689968539.pdfIn PDF document text
    • https://www.chesapeake-lighting.com/wp-content/plugins/super-forms/uploads/php/files/216f27caaed4b792b478a4455089a23a/mipusiges.pdfIn PDF document text
    • https://amatnieks.com/pictures/image/83465928066.pdfIn PDF document text
    • http://findmealocalpainter.com/insurazon/admin/userfiles/file/44020304636.pdfIn PDF document text
    • https://ceilford.org/wp-content/plugins/super-forms/uploads/php/files/0c1cf94cc8adbd3516a88df8fd7f2a95/bubiguvesivinuluxo.pdfIn PDF document text
    • http://bpabv.nl/uploadfiles/file/bewosalajisavumegodebojan.pdfIn PDF document text
    • https://canvasations.com/wp-content/plugins/super-forms/uploads/php/files/3jucmvo7m5t0ddgubormgolj21/34291547692.pdfIn PDF document text
    • http://www.lightingandhvacexpo.com/wp-content/plugins/super-forms/uploads/php/files/334aeb67c06c8eca8e996270cb9060d4/86616086243.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=introduction+to+the+theory+of+neural+computationPDF 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_off0000c0fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC0FA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d90c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD90C 18536 bytes
SHA-256: dcc5d5c30ab4b20f209213973bd0c85b33cb381a2338edfcbc08e17da97289de
font_02_sfnt_off000108ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108ED 10880 bytes
SHA-256: 44d0692c598ec0215a96ba33a448c5651b320531fbd64bc6c8c65bce969755fc

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