Malicious PDF — malware analysis report

Static analysis result for SHA-256 9898d660fbfb2d88…

MALICIOUS

PDF

90.2 KB Created: 2021-08-03 04:41:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: d0b4d7adf1c3f93e573ce6003c407b58 SHA-1: 51c880fefbd5f619a3c561fe6748effd3acc7280 SHA-256: 9898d660fbfb2d88a1fe95e599900710819707b9da9143719793d8496a1d9864
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, containing numerous URLs pointing to compromised WordPress upload directories and other disposable hosting. These links likely lead to phishing pages or further malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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://drafthe.ru/uplcv?utm_term=how+to+know+when+ue+boom+2+is+fully+charged PDF link annotation
    • https://www.advids.co/wp-content/plugins/formcraft/file-upload/server/content/files/160c5015316a61---14924020791.pdfIn PDF document text
    • http://scissortailfarms.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fb7ea50a26c---63168865833.pdfIn PDF document text
    • http://hsiwww.com/image/files/20210724_055944.pdfIn PDF document text
    • https://sellerflows.com/wp-content/plugins/super-forms/uploads/php/files/860664065d645061b85d2e7af931924a/51069315362.pdfIn PDF document text
    • http://www.zulfugar.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609990a3b1ac7---fevibawujisatomagemegis.pdfIn PDF document text
    • http://www.klpreschool.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073c3479f592---megosalog.pdfIn PDF document text
    • http://imaginove.eu/data/Files/webamevi.pdfIn PDF document text
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a29cb87bd06---fakerupojokupezid.pdfIn PDF document text
    • https://mytutr.com/wp-content/plugins/super-forms/uploads/php/files/e9aa1178d44867c1074739637c95abd2/90395076010.pdfIn PDF document text
    • https://deconkhoemanh.com/wp-content/plugins/super-forms/uploads/php/files/tungl1r2ahvoeln5ji6m6bjolj/dugopoxokedibiroxi.pdfIn PDF document text
    • https://ccskin.com/geektic/files/jifobisuz.pdfIn PDF document text
    • https://szabobuszberles.hu/files/files/kewosilaze.pdfIn PDF document text
    • http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/160948b199f190---gosimuzorigelu.pdfIn PDF document text
    • http://quincy.pl/ckfinder/userfiles/files/newirewotolaxajatilig.pdfIn PDF document text
    • http://mid-europe-ex.com/lifokaru.pdfIn PDF document text
    • http://daikinhbac.com/upload/files/3625545698.pdfIn PDF document text
    • http://architettomontanino.eu/userfiles/files/semosevuluvabodalej.pdfIn PDF document text
    • https://www.sir.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16076994c67cb1---1272337769.pdfIn PDF document text
    • http://jrmhandling.nl/upload/file/84278355683.pdfIn PDF document text
    • http://indianspringhomes.net/userfiles/files/58718510569.pdfIn PDF document text
    • https://www.sussexweddingservices.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160842a5d64c0e---ripuxune.pdfIn PDF document text
    • http://sazjah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160909afa7fe76---78896400994.pdfIn PDF document text
    • https://amrapalispot.com/userfiles/file/zoxitu.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f041.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF041 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001084e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1084E 1668 bytes
SHA-256: 21496ec7d819a181ecd5b04ef0af2d966874359b7a5f1303baf82341d98c4b9a
font_02_sfnt_off00011033.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11033 17528 bytes
SHA-256: 3cc44d3833bb8fa4c6b4032afe43616c8181cac9adbb652c809ebbb5254e7af6
font_03_sfnt_off00013e34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E34 11568 bytes
SHA-256: df0080b444709b2b8b8db5d09f21ce16a6e3c98221f0e40b183ca90177b79b6a

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