Malicious PDF — malware analysis report

Static analysis result for SHA-256 69ca0b0c0c3b58a8…

MALICIOUS

PDF

72.4 KB Created: 2021-09-26 18:47:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: ab184e2847d1e4b92f3d9920938f701a SHA-1: d1d0298646c369c4a694cad4faae4bcba6127c38 SHA-256: 69ca0b0c0c3b58a809ee6247c1db92b3dcbd03525ea4c8e4c0e615f52e78be37
156 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised websites and disposable hosting, suggesting a link farm designed to redirect users. The PDF structure and embedded URLs align with phishing or malware distribution tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://beta-rc.com/upload/files/saguvebururojakokuwisek.pdf In PDF document text
    • http://veiligheidssloten.nl/ckfinder/userfiles/files/29601102245.pdfIn PDF document text
    • http://phutungtdc.com/upload/files/fuvuj.pdfIn PDF document text
    • https://chaletsuenodesol.de/files/6182805898.pdfIn PDF document text
    • https://dagvandearchitectuur.be/_files/file/pokitonunujomema.pdfIn PDF document text
    • http://2girlstrippin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a1a2a1fbc4---xifelebugubujexuze.pdfIn PDF document text
    • http://snabsz.ru/ckfinder/userfiles/files/nudebowuletukizubevo.pdfIn PDF document text
    • http://polletnv.be/uploads/files/vuxezaxuralazuwebaf.pdfIn PDF document text
    • https://52fantasies.com/home/holly/public_html/ckfinder/userfiles/files/dupolen.pdfIn PDF document text
    • http://skuplaptop.pl/wp-content/plugins/formcraft/file-upload/server/content/files/161378889f3baf---solijamuduzosi.pdfIn PDF document text
    • https://nobelboya.com/userfiles/file/72061791608.pdfIn PDF document text
    • http://aasghsflqsae.handylover.com/upload/files/vilokorojepivazabopenin.pdfIn PDF document text
    • https://haps.company/wp-content/plugins/super-forms/uploads/php/files/cf83c3a7d69fbf11ea4270f19715fddc/93606193316.pdfIn PDF document text
    • http://vnos.vn/app/webroot/uploads/files/34648969761.pdfIn PDF document text
    • http://preiswerte-unterkunft-papenburg.de/mediapool/54487238492.pdfIn PDF document text
    • https://rewaqousha.net/userfiles/files/18814796895.pdfIn PDF document text
    • https://educhina.mn/editor/files/tagulegiwunituz.pdfIn PDF document text
    • http://sreema.org/FCKeditor/file/38754253535.pdfIn PDF document text
    • http://www.cenlajobinator.com/siteuploads/editorimg/file/laworug.pdfIn PDF document text
    • http://xn--e1aaafipco3bk8gra3b.xn--p1ai/upload_picture/file/bujifunezekolozewu.pdfIn PDF document text
    • http://vidol.nl/userfiles/file/894908670.pdfIn PDF document text
    • http://greenhousehotel.vn/uploads/image/files/sikurasixopivixires.pdfIn PDF document text
    • http://el-master.ru/userfiles/file/tudebomegedodeterotebuwu.pdfIn PDF document text
    • http://stainless-faucet.com/uploads/htmlupload/files/sedazoxi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=pokemon+mega+evolution+gbaPDF 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_off0000b42a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB42A 18496 bytes
SHA-256: e970c9157c6c67c2beeed76a2eaf6d5a4e338cccc52f564b68ca0962580e7642
font_01_sfnt_off0000e411.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE411 10584 bytes
SHA-256: 9a4aea5cc10ad890bb127f477dc262cecdd7b6cfe0b064a57dab4107d9cd0dd6
font_02_sfnt_off0000fc42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC42 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1