Malicious PDF — malware analysis report

Static analysis result for SHA-256 beb664c68f12fafd…

MALICIOUS

PDF

86.1 KB Created: 2021-06-26 12:15:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: d10691ad3db7a708eb7f615bff18468e SHA-1: 8607341222346f3b4ed8dab56c9d021432ff11ea SHA-256: beb664c68f12fafd730ba62564323733c87531a00ea9ca503f11afcaa239c93a
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains multiple heuristics indicating it is malicious, including ML classification and ClamAV detection. It presents a visual download button and embeds numerous links, many pointing to compromised CMS uploads or disposable hosting, suggesting a phishing or malware distribution attempt. The presence of a link farm with UTM parameters further supports a lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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 http://architects-desk.com/uploadsfile/40399612809.pdf In PDF document text
    • https://www.d-table.com/wp-content/plugins/super-forms/uploads/php/files/77a71f26e18701563a43d94ba39cc163/lagofafafiwowixi.pdfIn PDF document text
    • http://bephoangdung.vn/uploads/ckfinder/files/logoxenalizoweg.pdfIn PDF document text
    • https://portsidestrategies.com/wp-content/plugins/super-forms/uploads/php/files/b1a4807a5b2bbbd31c6ea5f79dce2088/desug.pdfIn PDF document text
    • https://www.officinadelgustoroma.com/wp-content/plugins/super-forms/uploads/php/files/11ba3f9b0f626cbce5d6d5328feabb82/kiwojivimejigip.pdfIn PDF document text
    • http://jngf.cn/files/file/29039023721.pdfIn PDF document text
    • http://www.holderit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6b448549a4---90375253400.pdfIn PDF document text
    • https://arenda1s.ru/wp-content/plugins/super-forms/uploads/php/files/29cc5f791bad1157b2d1511fedbb3f3b/2052956069.pdfIn PDF document text
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b208f50e652---65869602061.pdfIn PDF document text
    • https://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d0435a54f42---45845650247.pdfIn PDF document text
    • https://asiatravel.kg/wp-content/plugins/super-forms/uploads/php/files/5a30b8fc1d03f4dd77059084c4f70eea/momofilane.pdfIn PDF document text
    • http://banghaija.com/userfiles/file/fewosoz.pdfIn PDF document text
    • https://sakitonus.ru/wp-content/plugins/super-forms/uploads/php/files/8e8f487a5714762066589226d7f899fc/80470232582.pdfIn PDF document text
    • https://ontime-taxi.kg/wp-content/plugins/super-forms/uploads/php/files/ba959988422abe987e29ccfaf94447f5/juvofesulixosisatew.pdfIn PDF document text
    • https://beautifullifeuk.com/wp-content/plugins/super-forms/uploads/php/files/a26592b8144ed29c4d6fcc15cbc74c56/81203774963.pdfIn PDF document text
    • https://www.etbsupplies.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c52153950ed---92897233609.pdfIn PDF document text
    • http://capital96.com/userfiles/file/48242565152.pdfIn PDF document text
    • https://itacademyindia.com/ckfinder/userfiles/files/78368467257.pdfIn PDF document text
    • http://www.kocay.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160a1e14e10665---lidagamuputarus.pdfIn PDF document text
    • http://aprendanow.com/wp-content/plugins/super-forms/uploads/php/files/dbd037631130f7ec533891c66e3785f9/zojorunuxe.pdfIn PDF document text
    • http://www.molinoag.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c78b8e9665---zedoxatopatidukuguxijesa.pdfIn PDF document text
    • http://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b6116570cc4---pawijojowadefivun.pdfIn PDF document text
    • https://walnutcreekguide.com/wysiwygfiles/file/lorelefadejibijedojelu.pdfIn PDF document text
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/ios0cbti8s2496qtg2l01kjv26/48233805524.pdfIn PDF document text
    • https://mymovingestimate.com/wp-content/plugins/super-forms/uploads/php/files/6922427f827855f8b17a03cf5c93f072/62331394199.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=download+nfs+undercover+setup+exePDF 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_off0000eb74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB74 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001038b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1038B 10876 bytes
SHA-256: 3a0f1c55e8a79ad4d267755ad2544b2feaa9d126085bcf05e15e2a6d3225f8bd
font_02_sfnt_off00011cec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CEC 17472 bytes
SHA-256: 97b1b1ab7808a682e505c7780522ee0370f7d47fd445b2d3aaa7b74f5d33296d

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