Malicious PDF — malware analysis report

Static analysis result for SHA-256 84786ccfadd92549…

MALICIOUS

PDF

83.9 KB Created: 2021-09-10 12:27:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 01808999ce6d5edfd67d52946874a73d SHA-1: d8d0894f6cf12062711bcc6beb6c529b0f72572f SHA-256: 84786ccfadd92549e9c0fe354518e44d105832741f9047331906ceb8553478db
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many of which point to compromised websites or disposable hosting, suggesting a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to lure users to malicious content or downloads. No scripts were extracted, but the PDF structure itself is designed to facilitate malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://jaluzipro.ru/public/userfiles/file/zepetimarinawomasovege.pdf In PDF document text
    • https://rffsev.ru/wp-content/plugins/super-forms/uploads/php/files/0b36f22f99c5fd57246a3e61ca99fbba/bisuwimivaworok.pdfIn PDF document text
    • https://www.infratechgroep.nl/wp-content/plugins/super-forms/uploads/php/files/a2deac1dde51d2a0c75c8b0dd567de62/92583046162.pdfIn PDF document text
    • https://sts-cct.com/app/webroot/userfiles/files/70124902721.pdfIn PDF document text
    • https://mrpressconsulting.com/UserFiles/file/suzijabulikeka.pdfIn PDF document text
    • https://thefertilizerproductionline.com/d/files/zaxavuge.pdfIn PDF document text
    • https://foodphotoshop.com/userfiles/files/62614641941.pdfIn PDF document text
    • http://tonioloclaudio.it/userfiles/files/xumituvixaripoxijimovigi.pdfIn PDF document text
    • http://www.instalacionescueto.com/nueva/ckfinder/userfiles/files/41895447161.pdfIn PDF document text
    • https://fertilizergranulatorprice.com/d/files/xovobopunuwomagi.pdfIn PDF document text
    • https://lashmakerpro.it/wp-content/plugins/super-forms/uploads/php/files/93hqv1lj72n2t0ej7tnl2ciuu4/15425303776.pdfIn PDF document text
    • http://fatfailogistics.com/fckeditor/files/file/88549056216.pdfIn PDF document text
    • http://futureinfashion.com/ckfinder/userfiles/files/55364991629.pdfIn PDF document text
    • http://www.consorcio.edu.pe/wp-content/plugins/formcraft/file-upload/server/content/files/16137d20d78532---wobajibukiz.pdfIn PDF document text
    • http://turar-mussin.com/userfiles/File/sesolepese.pdfIn PDF document text
    • https://ewt.cz/res/file/dokowidujom.pdfIn PDF document text
    • https://ltes.tw-goods.com/UserFiles/files/81209551482.pdfIn PDF document text
    • http://timebymtm.com/upload/files/japevamolegufavu.pdfIn PDF document text
    • https://bbu.vn/Images_upload/files/mozobolavoxanivafetijobu.pdfIn PDF document text
    • https://www.olympusnorge.no/wp-content/plugins/super-forms/uploads/php/files/e8r4m9kqsvf0ucfn5uj5230f00/fotodalikikojif.pdfIn PDF document text
    • https://ppkh.net/userfiles/file/kajenamemebowizifapimo.pdfIn PDF document text
    • http://cnsgafgl.netsociality.com/upload/files/podinitixegezuwe.pdfIn PDF document text
    • http://haozuowenwang.com/imagefiles/file/jukavubuxotefedax.pdfIn PDF document text
    • http://mygiftltd.com/userfiles/file/53707722137.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=share+iphone+calendar+with+android+userPDF 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_off0000e348.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE348 17456 bytes
SHA-256: 87258071d6cd3946055149c02d74d2a571e4af8ea5a601603632f7e7e0a5f017
font_01_sfnt_off00011069.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11069 10872 bytes
SHA-256: f029fdf4312ee9babe121665cc7880339bed8724dc07e546af47452cd744cdc1
font_02_sfnt_off00012984.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12984 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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