Malicious PDF — malware analysis report

Static analysis result for SHA-256 b924effc611160c8…

MALICIOUS

PDF

79.8 KB Created: 2021-09-20 04:08:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 5dc87fb17dfac540d3ab6854c352e80c SHA-1: 42a0512a676d8d47c6ea419eac1b58e357b9a2e3 SHA-256: b924effc611160c8d5f9c01691b33750333c15b8d8ca93de2e100ba4cf2e0b4a
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics as malicious, including a ML classifier and ClamAV detection. It contains numerous external URIs and link farms pointing to potentially compromised websites or disposable hosting, suggesting a phishing or malware distribution attempt. The presence of external links and the nature of the heuristics indicate the file's primary purpose is to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://garglob.ru/uplcv?utm_term=free+football+matches PDF link annotation
    • http://etkenkalip.com/files/sepezikizateri.pdfIn PDF document text
    • http://mdbim.pl/ubezpiecz/obrazy/file/gibufi.pdfIn PDF document text
    • http://mextro.de/upload/files/xusivufepatigiruvu.pdfIn PDF document text
    • http://clickvay.com/upload/files/jotawefukarivinede.pdfIn PDF document text
    • http://tunapvietnam.thietbiotoviet.com/Images_upload/files/nuzifidetoxedapenok.pdfIn PDF document text
    • https://bibonatura.com/ckfinder/userfiles/files/sozawapipo.pdfIn PDF document text
    • https://eliteswimmingpoolsinc.com/wp-content/plugins/super-forms/uploads/php/files/a3qsc5019p9e719mvhdlgpkd86/xuxenagupesofubu.pdfIn PDF document text
    • http://simonkuehner.de/gfx/userfiles/files/kidetidagijetosedetuzijif.pdfIn PDF document text
    • http://www.commandinglife.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f1bc0c6320---73490465090.pdfIn PDF document text
    • https://podiummagazinenews.com/ckfinder/userfiles/files/numalebosilofiludujiva.pdfIn PDF document text
    • http://ourpreferred.com/userfiles/files/gixin.pdfIn PDF document text
    • https://empresa-venta.hr/files/33447116346.pdfIn PDF document text
    • http://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137db2f46252---sojazojikitizanufoviw.pdfIn PDF document text
    • http://vnationwide.com/userfiles/files/gepomibaledusekelagawap.pdfIn PDF document text
    • http://midesignvn.com/uploads/files/fifajuxazijipiturukukama.pdfIn PDF document text
    • https://muachungbaohiem.com/uploads/userfiles/file/90142170221.pdfIn PDF document text
    • https://xpress2.eu/ckfinder/userfiles/files/50541355260.pdfIn PDF document text
    • https://mamotato.ro/userfiles/file/69181998738.pdfIn PDF document text
    • http://antichigelsi.it/userfiles/files/sokarijijaxoruge.pdfIn PDF document text
    • http://bluestandard.pl/ckfinder/userfiles/files/71059741660.pdfIn PDF document text
    • https://mandalaconfeccao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16144ba6910216---ledinavawaku.pdfIn PDF document text
    • http://dmkert.hu/files/file/26654804631.pdfIn PDF document text
    • https://comobrew.com/newsite/images/user_uploads/file/kuxozaxibifowutapalutep.pdfIn PDF document text
    • https://www.infratechgroep.nl/wp-content/plugins/super-forms/uploads/php/files/36cc2250ae43f2f901344b2070bf653d/19272327811.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_off0000d4ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4CE 10520 bytes
SHA-256: 6aa6fa9dfd41b10775fb50578e2d37e2bb73dcf4c161dee4a84e956de5ffa907
font_01_sfnt_off0000ecc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECC5 17412 bytes
SHA-256: 9f8833da7a829fae8e26b039ddf256b4988fe1104eda40249e35f33aace0c59a
font_02_sfnt_off000119ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119ED 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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