Malicious PDF — malware analysis report

Static analysis result for SHA-256 00f012dd8ecc0615…

MALICIOUS

PDF

93.1 KB Created: 2021-09-02 23:44:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 9606ed0e5525eca20fe9a19c3f59cb42 SHA-1: a31ed8b15112d6caf9b2b16069d3613d2fd7ba81 SHA-256: 00f012dd8ecc0615fc4c01a4941b448deee33bc2fee280a909ea8cb4663bd5cb
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for executing malicious code within documents. The presence of numerous external URIs, many pointing to compromised CMS uploads or disposable hosting, indicates a link farm designed to redirect users to potentially malicious content. ClamAV detection and ML classification further support its malicious nature, likely as a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9726

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://coretry.ru/uplcv?utm_term=four+winds+spa+user+manual PDF link annotation
    • http://fjzy18.com/image/uload/files/rasejasazogovefafiriwid.pdfIn PDF document text
    • http://cncforginghammer.com/d/files/34192413339.pdfIn PDF document text
    • https://www.psk.com.au/application/third_party/ckfinder/userfiles/files/48947158640.pdfIn PDF document text
    • https://www.icicle-mountaineering.ltd.uk/ckfinder/userfiles/files/50654355037.pdfIn PDF document text
    • https://deltarents.com/upload/ckfinder/files/42902553774.pdfIn PDF document text
    • https://caror.hu/ckfinder/userfiles/files/80005632722.pdfIn PDF document text
    • https://zemiigori.com/uploads/file/dalinulisepugawufolur.pdfIn PDF document text
    • https://envomask.com/wp-content/plugins/super-forms/uploads/php/files/6db4b7590ddba60738ce245d92904b9f/milupofabopoj.pdfIn PDF document text
    • http://willbramephotography.com/pokuxitatawixiramuj.pdfIn PDF document text
    • https://freedomtampons.com/wp-content/plugins/super-forms/uploads/php/files/ec3cf5ea1b97324ccb5eeec68ce483a8/kotebunilupuzomopowu.pdfIn PDF document text
    • https://kingdomofgodmn.org/userfiles/files/jojizetubinibenibijule.pdfIn PDF document text
    • http://driscollandgibson.com/images/edit_images/file/mifefabovedu.pdfIn PDF document text
    • https://www.emmabowman.com/wp-content/plugins/super-forms/uploads/php/files/d6de460865d290ae73cc0dace31511ed/pulabixadapedafevixev.pdfIn PDF document text
    • http://mountmedpharmacy.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160d31f61d1213---ratuwidekaxi.pdfIn PDF document text
    • https://www.andyselfstorage.co.uk/wp-content/plugins/super-forms/uploads/php/files/81bsjf817jbfmkam12jr44iva2/38743672746.pdfIn PDF document text
    • http://www.cargeacrew.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/161004d91eba00---7683722008.pdfIn PDF document text
    • https://jollytime.ru/wp-content/plugins/super-forms/uploads/php/files/8086723b3d4b753cdfde20e05d8450a6/jojowigu.pdfIn PDF document text
    • https://www.bouwenaaneensterkwerkgeversmerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b530cb947a8---tuvugolomoderewadi.pdfIn PDF document text
    • http://energo-market.ru/sadm_files/lepekagitakoxofelidununif.pdfIn PDF document text
    • http://www.goataxiservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa34903820c---woxas.pdfIn PDF document text
    • https://kassa-evotor.ru/wp-content/plugins/super-forms/uploads/php/files/uumtrjhpbql5gub4kdvbmq1lt1/89424055836.pdfIn PDF document text
    • http://sotel-perm.ru/site/file/78160553464.pdfIn PDF document text
    • http://peach2560.xyz/js/ckfinder/userfiles/files/70418017156.pdfIn PDF document text
    • http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a83ed7207ca---jilisitupawobodemisemim.pdfIn PDF document text
    • http://hoondb.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608aaae8c4201---jolupuvivigipujozi.pdfIn PDF document text
    • http://teamhead.net/userfiles/file/79638726430.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
stream_003_off0000eb7e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xEB7E 17856 bytes
SHA-256: 11549057d1ec2f52ab97c30fef0e0cb5a0e18d8a2ce9ca2a7f1f9cded986424b
font_01_sfnt_off0001071f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1071F 10620 bytes
SHA-256: 2695faf7380ca619c64510d7c9918143eb752669cb7c977d45cfaedd932132df
font_02_sfnt_off00011f61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F61 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00013773.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13773 17888 bytes
SHA-256: 8f163d7d29a52b62d4f3b47ed3e05915644b3372401a13a155d24e1005005612

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