Malicious PDF — malware analysis report

Static analysis result for SHA-256 484f07f68a5311f7…

MALICIOUS

PDF

79.4 KB Created: 2021-07-28 09:04:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 11daa70ad71fdf5c050fa628329f7d31 SHA-1: 7b4f98c10b6ab9c790e8fefe27f389f31df6b4d6 SHA-256: 484f07f68a5311f7d305fa50508144bb31b15b3285e28ce0d2ae05021604a92e
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to multiple domains, several of which are hosted on compromised CMS platforms, indicating a phishing or redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to lure users to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://www.louthadventures.ie/wp-content/plugins/formcraft/file-upload/server/content/files/1606eab23793e0---tijajin.pdf In PDF document text
    • http://www.polni.si/Images/files/nilixizari.pdfIn PDF document text
    • http://asianaccounting.com/admin/fckeditor/userfiles/file/71636068082.pdfIn PDF document text
    • https://www.icslights.com/wp-content/plugins/super-forms/uploads/php/files/667bbdf4daf863279b91cec000f46bca/87535821605.pdfIn PDF document text
    • http://www.ecvbrass.ch/user/web/file/pigoxoxawibujuta.pdfIn PDF document text
    • https://thepetrichortouch.com/wp-content/plugins/super-forms/uploads/php/files/cke479inapsfbfpqonernqgs0c/zakuzutadimulotefin.pdfIn PDF document text
    • http://skiflogistics.ru/userfiles/file/1092860376.pdfIn PDF document text
    • http://tsrmmessina.it/userfiles/files/4368572172.pdfIn PDF document text
    • https://krassimirtaskov.com/userfiles/files/birodiwebavelejidumelefag.pdfIn PDF document text
    • http://qamsar.org/userfiles/files/18835216259.pdfIn PDF document text
    • https://pottoka.info/files/galeria/files/99511440630.pdfIn PDF document text
    • https://wurstfargo.com/wp-content/plugins/super-forms/uploads/php/files/baffc366881572a6f16c24ed01b94c6b/jabapitit.pdfIn PDF document text
    • http://aodaibooking.com/FileData/ckfinder/files/20210709_47C61AEC1128D200.pdfIn PDF document text
    • https://www.qbuildsoftware.com/wp-content/plugins/super-forms/uploads/php/files/f9f1bbebaf9d491769b9d13326b5ba17/nigipobegogufid.pdfIn PDF document text
    • http://evolutionchonburi.com/userfiles/files/bojazefumulugisarewefital.pdfIn PDF document text
    • http://luisacortesearchitetto.it/userfiles/files/79204267545.pdfIn PDF document text
    • http://fogathajtohirek.hu/fckfiles/file/duzesigeliferajonuf.pdfIn PDF document text
    • https://masini-de-ambalat.ro/images/userfiles/vamirewipuzidedatozowe.pdfIn PDF document text
    • https://www.mercedesbenzofaustinservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a533bf4313b---regawotimomusawujawasusaf.pdfIn PDF document text
    • https://bonpetsupply.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086c14a15ffe---95702672462.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=cuanto+vale+un+metro+cubico+a+centimetros+cubicosPDF 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_off0000d0f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0F0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e902.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE902 17452 bytes
SHA-256: 3d73a4292c45fa25a01cab12faffdf3ec5915ef4c67512816173e66c36e1c537
font_02_sfnt_off000114a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114A6 10728 bytes
SHA-256: edf640d341055ac54d844228907c57155f5b4055e6edfab8623dd5c190a59d0e