Malicious PDF — malware analysis report

Static analysis result for SHA-256 9eb06e0251536ba3…

MALICIOUS

PDF

83.0 KB Created: 2021-09-13 20:15:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: a4bd54501ff5451cb4bd29d82f782fa9 SHA-1: bc5f59d12cde06c4227bdbfbe9795449b925ad6b SHA-256: 9eb06e0251536ba36c55468150ad3771c9e59969ac3e1c5efae781597b53141c
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains numerous embedded URLs, many of which point to compromised CMS uploads or disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The primary purpose appears to be to lure users into clicking these links, potentially leading to phishing pages or malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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://ketchas.ru/uplcv?utm_term=ecg+made+easy+9th+edition+pdf+download PDF link annotation
    • https://medicentrumnz.eu/medicentrum/files/file/wobepunulerunizitetugof.pdfIn PDF document text
    • http://basse-normandie.annuaire-regional.com/ckfinder/userfiles/files/pubeleligusijivasamam.pdfIn PDF document text
    • http://sanyosushiglendora.com/uploads/files/79362239868.pdfIn PDF document text
    • http://baliretreatcenter.com/olabali_ci/media/images/newsfiles/danume.pdfIn PDF document text
    • https://www.mercedesbenzofaustinservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137db552806b---485415552.pdfIn PDF document text
    • http://portakalweb.net/home/portakal/public_html/ckfinder/userfiles/files/19173888596.pdfIn PDF document text
    • http://china-engine.net/ckfinder/userfiles/files/61152134912.pdfIn PDF document text
    • https://www.kadinlarsitesi.org/wp-content/plugins/formcraft/file-upload/server/content/files/16134dc27d527e---sixetimimamaki.pdfIn PDF document text
    • http://lt101shop.com/userfiles/files/64337869073.pdfIn PDF document text
    • https://dammesliepas.lv/ckfinder/userfiles/files/93796448436.pdfIn PDF document text
    • http://uniondrygoods.com/fckeditor/userfiles/file/fazufavamubodima.pdfIn PDF document text
    • https://andymullinscommercial.com/home/andy/public_html/ckfinder/userfiles/files/zowagakiloxirenavasub.pdfIn PDF document text
    • https://acethamessecurity.co.uk/wp-content/plugins/super-forms/uploads/php/files/79c3186314900239545838a93286c078/dawefiwo.pdfIn PDF document text
    • https://mobilaide.com/upload/editor/file/mogofos.pdfIn PDF document text
    • http://newgrids.com/userfiles/file/48511563732.pdfIn PDF document text
    • http://botaierpharm.com/upload/files/92577558711.pdfIn PDF document text
    • http://kuehllawpc.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/gagekebukefoxidudifex.pdfIn PDF document text
    • http://sonsuadogo.org/Images_upload/files/rosotugumej.pdfIn PDF document text
    • http://chemicalengineers.ie/images/venirikizufevupedi.pdfIn PDF document text
    • http://clinicaveterinariailmarzocco.it/userfiles/files/babatufefojodopekoxawagim.pdfIn PDF document text
    • http://neodentpetrosino.it/userfiles/files/95691180096.pdfIn PDF document text
    • https://aquafilling.com/userfiles/file/52836136760.pdfIn PDF document text
    • http://aviatechinform.ru/sadm_files/55435689551.pdfIn PDF document text
    • http://dossalas.com/wp-content/plugins/super-forms/uploads/php/files/8ba85a3d3432ddac41951943a7a7a87e/75894126074.pdfIn PDF document text
    • https://interconformity.ro/images/file/89934132466.pdfIn PDF document text
    • http://ecogestval.com/userfiles/file/wisuzepuvuxotig.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_off0000df70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF70 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f787.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF787 11316 bytes
SHA-256: d03ddfcd1f74fc1dc785db565bfe604d7a45705abcae75b73e8a677705cfda74
font_02_sfnt_off000111dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111DC 17036 bytes
SHA-256: 1fb2196faeafda99a9746dd2b2b879f98193b2dc3b21fd7d85286e1d6d38978f

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