Malicious PDF — malware analysis report

Static analysis result for SHA-256 96facdff01bf1256…

MALICIOUS

PDF

81.7 KB Created: 2021-09-10 02:14:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: e63caede196050b51333bc17668f893b SHA-1: ac4f31176edbb3bae24226565648efffeb3d5709 SHA-256: 96facdff01bf125622a146b05a8db803398d2e46bb4a44b768781c7f314d9b4e
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised websites or disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The embedded JavaScript likely facilitates the redirection to these malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://huntic.ru/uplcv?utm_term=funny+face+filter+snapchat PDF link annotation
    • http://asustainable.com/global/file/33637059539.pdfIn PDF document text
    • https://mbzl-pro.xyz/web/img/podborky/files/85318267980.pdfIn PDF document text
    • https://www.marbelitesa.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1612f79b5bcd1f---25461969659.pdfIn PDF document text
    • https://rebates.forex/wp-content/plugins/super-forms/uploads/php/files/15d0j8k443om7hvr0hrq14en54/pijitefage.pdfIn PDF document text
    • https://autosaloncenter.com/uploads/file/wakuvewenuwuvixejojum.pdfIn PDF document text
    • http://www.iso-clean.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1613207df04b7c---sofawifuwenokefi.pdfIn PDF document text
    • http://branpc.in/ckfinder/userfiles/files/72612487326.pdfIn PDF document text
    • http://zs-oilfieldequip.ru/d/files/baduvokepujinimasoxoven.pdfIn PDF document text
    • http://come2menorca.com/images/file/wezap.pdfIn PDF document text
    • http://sapaelitehotel.com/webroot/img/files/xanotodokakikemomev.pdfIn PDF document text
    • http://dobrejaja.com/Upload/file/60448690161.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/16135035ed7c6e---67423322892.pdfIn PDF document text
    • https://confidence-ist.com/ckfinder/userfiles/files/kunirinugoxokevajasimi.pdfIn PDF document text
    • http://stjconsulting.it/userfiles/files/serizasis.pdfIn PDF document text
    • http://vaynhe.com/upload/files/jodukibijot.pdfIn PDF document text
    • http://csc0516.com/userfiles/file/20210902202214_pre4ae.pdfIn PDF document text
    • https://suncables.co/images/file/mizadenagomewere.pdfIn PDF document text
    • https://abyway.lv/images/ck_images/files/69416865014.pdfIn PDF document text
    • http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612ff1aaba279---xenovijezolopajaguzajivug.pdfIn PDF document text
    • https://bisleri.genefied.co/ckfinder/userfiles/files/85942658117.pdfIn PDF document text
    • http://k-ookuma.com/js/upload/files/93536043513.pdfIn PDF document text
    • https://sambelteri.com/contents/files/jirotuf.pdfIn PDF document text
    • https://cakamuzejs.riga.lv/ckfinder/userfiles/files/8837834988.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_off0000dbc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBC3 10648 bytes
SHA-256: 683dd30057c6c4f596b426862d158c04b212a938ca170c74a91194a1ba98f6a7
font_01_sfnt_off0000f412.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF412 17500 bytes
SHA-256: 584c528860343eef9c166d147b26da0ac97dfa853dbf4462699b13e332061da2
font_02_sfnt_off0001213a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1213A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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