Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f1d04a8430d3ed9…

MALICIOUS

PDF

87.8 KB Created: 2021-09-20 14:24:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 4bb065659a5129265f31f1ac93e13622 SHA-1: 2458bb209cb8a2257b9bf7d803bdda0f222bc5f6 SHA-256: 7f1d04a8430d3ed920186b15a0b17ff700a93dccc3a37d80e8e245808b797dc0
156 Risk Score

Malware Insights

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

The PDF contains numerous external URIs and links to compromised CMS uploads, indicating it functions as a link farm. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution through these links. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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://crysiq.ru/uplcv?utm_term=super+17+dragon+ball+legends PDF link annotation
    • https://www.myjamaicais.com/wp-content/plugins/super-forms/uploads/php/files/981dc972ee4ae4b64f24704c057ee69c/depivegavunones.pdfIn PDF document text
    • http://meuble-tunisie.com/userfiles/file/53259844904.pdfIn PDF document text
    • http://vishwkarmaenterprises.com/webroot/img/userfiles/files/10547096944.pdfIn PDF document text
    • https://kujainspectors.com/candyticket/uploads/page_images/files/radilez.pdfIn PDF document text
    • https://www.la-providence-ehpad.fr/ckfinder/userfiles/files/gagerakuk.pdfIn PDF document text
    • http://www.hollyskauaicondo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133ced91f344---logusebew.pdfIn PDF document text
    • http://yangs-ns.com/ckfinder/userfiles/files/20210912233137.pdfIn PDF document text
    • http://tabouligrill.com/ckfinder/userfiles/files/bebiliripemaravikudidilu.pdfIn PDF document text
    • http://baihsad.com/userfiles/files/20210905_194842.pdfIn PDF document text
    • http://tehnicgaz.eu/files/file/givuwenijojenofite.pdfIn PDF document text
    • http://mannadey.in/FCKeditor/file/67897067513.pdfIn PDF document text
    • http://interroadholland.nl/userfiles/file/tapogukaxuxuxipikigeta.pdfIn PDF document text
    • http://kuppersbusch.hu/userfiles/files/pajeme.pdfIn PDF document text
    • http://pevak.info/UserFiles/File/nudosi.pdfIn PDF document text
    • http://elmbbq.com/uploads/files/xugudovibabobaxaz.pdfIn PDF document text
    • http://mkpstroitel.ru/upload/files/nexaba.pdfIn PDF document text
    • http://baharemadinah.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130f8b749293---gofabepomafeguz.pdfIn PDF document text
    • https://lesrimaudieres.com/images/uploads/file/97442688561.pdfIn PDF document text
    • https://sindonis.com/userfiles/file/wusiridiberarite.pdfIn PDF document text
    • https://cjsc.se/ckfinder/userfiles/files/46335792601.pdfIn PDF document text
    • https://traveletrust.com/basefile/traveletrustcom/files/janijixiv.pdfIn PDF document text
    • http://snap-drone.com/userfiles/file/91964184480.pdfIn PDF document text
    • http://shtaket46.ru/page_edit/_samples/userfiles/files/28704985274.pdfIn PDF document text
    • http://zhouzhuanx.com/v15/Upload/file/20219201117204268.pdfIn PDF document text
    • https://www.soroptimist.be/oldsite/intranet/ckeditor/ckfinder/userfiles/images/files/25475229808.pdfIn PDF document text
    • http://merrygoldholidays.com/ckfinder/userfiles/files/xogaxakogedizewixoledolu.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_off0000e8b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8B6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000100c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100C8 20776 bytes
SHA-256: 5a8ddb32237f3923871d187479f19c8e5e30f3eebb8382a66162b81c7041353b
font_02_sfnt_off00013759.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13759 10792 bytes
SHA-256: e34874069c3ea1ac5f6d0733b70a1147d070ad3ab4ca014d8245aca73ed2ca2b

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