Malicious PDF — malware analysis report

Static analysis result for SHA-256 c59ee864f230b05f…

MALICIOUS

PDF

75.8 KB Created: 2021-09-11 05:13:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 5ad4552f7510abb25603ae08365f81fe SHA-1: 1ca02f059a168851a08bbae57f2b899c27a26b3c SHA-256: c59ee864f230b05f02b3e3314cbe0d1834aa48df1c2111def204a1a051dafdc9
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by a machine learning classifier and ClamAV. It functions as a link farm, containing numerous embedded URLs that point to various websites, many of which appear to be compromised or disposable hosting. The primary purpose seems to be redirecting users through a network of sites, potentially for SEO manipulation or to serve further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://hunting.kg/userfiles/file/jejatibusigubedipatenu.pdf In PDF document text
    • https://htfcompact.com/wp-content/plugins/super-forms/uploads/php/files/74c9199855c708accce28811e6a24358/wefipabiriwotabajuru.pdfIn PDF document text
    • http://lawyersmarketingusa.com/user_upload_image/file/In PDF document text
    • http://getdol.com/page_data/file/1362430833.pdfIn PDF document text
    • http://restavratorstvo.com/ckfinder/userfiles/files/duzakanopirogajoxopen.pdfIn PDF document text
    • http://elcolono.net/userfiles/files/sosutafukekagogopopor.pdfIn PDF document text
    • https://www.drserapkagan.com/wp-content/plugins/super-forms/uploads/php/files/gp66qlf6dilks53kjn3vcfq7ls/96438688505.pdfIn PDF document text
    • http://counterreaction.net/wp-content/plugins/formcraft/file-upload/server/content/files/1613b707071e4f---bowolijogujinolaw.pdfIn PDF document text
    • https://hantverkarenisandby.se/UserFiles/files/zasoruvixurenazipimala.pdfIn PDF document text
    • http://oroblupiscine.it/userfiles/files/42209738698.pdfIn PDF document text
    • http://staropolski.net/Upload/file/vexelutanazagagezaj.pdfIn PDF document text
    • http://scherzerpc.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/47424096956.pdfIn PDF document text
    • http://mobitransjogja.com/files/60884990340.pdfIn PDF document text
    • https://legend-chang.com/UserFiles/files/modudumikudulaxada.pdfIn PDF document text
    • http://synthecinter.com/userfiles/files/55398656860.pdfIn PDF document text
    • http://fruitsad.pl/images/file/jusojurajigomagexin.pdfIn PDF document text
    • https://zivotzaokny.eu/res/file/51826392403.pdfIn PDF document text
    • http://www.frank-diagn.hu/userfiles/files/53343056903.pdfIn PDF document text
    • https://yp05.com/_UploadFile/Images/file/51887352757.pdfIn PDF document text
    • http://yeosingol.com/FileData/ckfinder/files/20210903_B85C510EF9B2B695.pdfIn PDF document text
    • http://mh-gartengestaltung.de/userfiles/file/13958124330.pdfIn PDF document text
    • http://www.corazondelsol.es/ckfinder/userfiles/files/masitulogusabexizatatu.pdfIn PDF document text
    • https://haltia.mx/sii/ckfinder/userfiles/files/gijidivazoparu.pdfIn PDF document text
    • http://baschin-heizung.com/meineBilderAlbertGrundschule/file/vezunogenijudupimunul.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=tamil+play+2019+new+movies+downloadPDF link annotation
    • http://louisiana-arts.org.s150269.gridserver.com/siteuploads/editorimg/file/bufapitaxetemad.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_off0000c2e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC2E6 17404 bytes
SHA-256: 587ac33975a7c514c1f2d66291155e328a5c9eec52a378618d66cc06e7787fd5
font_01_sfnt_off0000ef90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF90 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000107a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107A7 11048 bytes
SHA-256: 8bf4f65b0d573444f977f99477af29e90cd05902a6a6475ee077cac8a1a724d3

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