Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6bb80a507da63e5…

MALICIOUS

PDF

85.7 KB Created: 2021-09-18 02:42:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: fa14ad56c043abfa14179a3c22624ea7 SHA-1: a2ede6807d9e17858a953989f0cf414baaf04bf2 SHA-256: d6bb80a507da63e59d66b8ef3342080a7689d5c3466132482aef21f442e3bcf6
164 Risk Score

Malware Insights

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

The PDF contains numerous links to external resources, many of which are hosted on compromised or disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of a 'download button' heuristic and ClamAV detection as 'Pdf.Phishing.Trojan' strongly indicates a phishing or malware distribution attempt. The ML classifier also flagged the PDF with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://egokituz.eus/files/galeria/files/47590547476.pdf In PDF document text
    • http://delve-cr.com/uploads/radeludanox.pdfIn PDF document text
    • http://poslovniimenik.net/firme_data/files/63920615403.pdfIn PDF document text
    • https://aspirans.com/files/file/majoligowelasusel.pdfIn PDF document text
    • http://metalzilembo.it/userfiles/files/62318975385.pdfIn PDF document text
    • http://mos-craciun-inchiriere.ro/fckfiles/file/nuxefu.pdfIn PDF document text
    • http://reversetheclocknow.com/ckfinder/userfiles/files/tuwupirotopezel.pdfIn PDF document text
    • http://garderoba.sk/images/_file/niwodisofutoxanavifix.pdfIn PDF document text
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/161387e1255d93---97141223760.pdfIn PDF document text
    • http://klimatyzacjaradom.pl/userfiles/file/penabivefov.pdfIn PDF document text
    • http://web5gstore.com/Files/files/wapukoralidatizijojiraz.pdfIn PDF document text
    • http://goldenteriyaki.com/uploads/files/vebevisatizemezelid.pdfIn PDF document text
    • https://weboonline.com/ckfinder/userfiles/files/dumiferaf.pdfIn PDF document text
    • https://inprovitparaguay.com/ckfinder/userfiles/files/xanox.pdfIn PDF document text
    • http://scamps.biz/userfiles/file/zebugulofugusulinikel.pdfIn PDF document text
    • http://5thaveseniors.org/userfiles/file/21503594036.pdfIn PDF document text
    • https://beaumont-residence.com/wp-content/plugins/super-forms/uploads/php/files/stfupujuj4mbqbcnlnror4pj5e/2794618637.pdfIn PDF document text
    • https://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613f69ba2f066---63159291820.pdfIn PDF document text
    • http://johnmichaelharrisonlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/86837061834.pdfIn PDF document text
    • http://confidenzacsapagy.hu/upload/18779954445.pdfIn PDF document text
    • https://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612fcc67a4dbe---1147566941.pdfIn PDF document text
    • http://jutaek.humenia.com/upload/userfiles/2021/09/files/210918064756.pdfIn PDF document text
    • https://marcvandewiele.com/userfiles/file/pamapuxodatofabuvoko.pdfIn PDF document text
    • https://sinarlangit1.com/contents/files/guzofive.pdfIn PDF document text
    • http://knowleangling.co.uk/ckfinder/userfiles/files/vilixigerugugefufizoz.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=status+quo+rockin+all+over+the+world+chordsPDF 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_off0000e58e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE58E 11032 bytes
SHA-256: 5eb6d35e10e3b5fc6c6c200a1f1af6fef72fb6c128596c18b2c12109b20442f3
font_01_sfnt_off0000fef7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEF7 18240 bytes
SHA-256: c8366fc7174a4cebfc4c6e8e7654c3168d0338829227e5f140e469afeab89960
font_02_sfnt_off00012eed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EED 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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