Malicious PDF — malware analysis report

Static analysis result for SHA-256 05dd95264bff553e…

MALICIOUS

PDF

96.9 KB Created: 2021-08-13 03:09:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: d70de4fc9e6e3b2bb9901246bef289aa SHA-1: fda7a266681ad42fffafc1eb5e2a204d94490d9d SHA-256: 05dd95264bff553e0d5f94f4c43fba258e6ebb589444e2d30944abee220126c1
164 Risk Score

Malware Insights

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

The PDF contains numerous external URIs and links to websites, many of which are hosted on compromised CMS platforms, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution through these links. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9926

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 https://pixomot.ru/uplcv?utm_term=fm+whatsapp+version+8.0+apk+download PDF link annotation
    • http://kuresi-kaitori.com/upload/content_pic/files/60592787101.pdfIn PDF document text
    • http://bagiez.com/userfiles/file/panibesomolajuwazewiri.pdfIn PDF document text
    • http://hf1968.com/clients/48820/File/mobegegigegigosovo.pdfIn PDF document text
    • http://sanchariglobal.com/userfiles/file/40772943905.pdfIn PDF document text
    • https://acethamessecurity.co.uk/wp-content/plugins/super-forms/uploads/php/files/9a3a7ec174a04cf6719919ae727a7ca9/fuwaterubow.pdfIn PDF document text
    • http://grupogmec.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a16faf06de6---53680898259.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160981f7be966f---rorivem.pdfIn PDF document text
    • http://ourgans.org/userfiles/files/rakizubofolaxeven.pdfIn PDF document text
    • https://angelsstaff.com/uploads/file/wodagudotexufexujoleligob.pdfIn PDF document text
    • http://grafiport.com/userfiles/file/dilozawijuxuvamupuwuxa.pdfIn PDF document text
    • https://www.tai.gr/wp-content/plugins/formcraft/file-upload/server/content/files/16088d4569d2f5---kidosomalirimuvipoxivelim.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/bn04crgf4m2vstt5gjnd4lish5/gaweberume.pdfIn PDF document text
    • http://uat2.hkha.com.hk/ckfinder/userfiles/files/35433133764.pdfIn PDF document text
    • https://noukos.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160770fed78201---nafuludafap.pdfIn PDF document text
    • https://areicon.com/images/file/96192504534.pdfIn PDF document text
    • https://theelementrama9.com/userfiles/files/vuxujexosiwiz.pdfIn PDF document text
    • http://salon-urody-bellis.pl/images/file/55613299544.pdfIn PDF document text
    • https://bilbox.es/wp-content/plugins/super-forms/uploads/php/files/d09e9ed9915bb178d0fff7623501e513/35304215990.pdfIn PDF document text
    • http://protech.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/160971411a8d2c---fezagererebonijeruzomo.pdfIn PDF document text
    • http://orhs89reunion.com/clients/77823/File/wumuwusorenabu.pdfIn PDF document text
    • http://skup-laptopow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160de61aa6f088---lawadigozegafarisowaw.pdfIn PDF document text
    • https://www.golddustdental.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081809fb3acf---35391759156.pdfIn PDF document text
    • https://www.crossfitparamaribo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6ac814f8e3---92353568440.pdfIn PDF document text
    • http://purofirstli.com/userfiles/files/20636034861.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
font_00_sfnt_off0000fdf8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDF8 16304 bytes
SHA-256: 72b6d5534888ecec27fd68dccf88827b5fbc3510db23809d90398b76a33fedee
font_01_sfnt_off000113ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113ED 11276 bytes
SHA-256: a96a63a8ff992463fc94398a3eedcd1f15c6d114fc34adb9e0f97c9f79fa1354
font_02_sfnt_off00012e33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E33 17872 bytes
SHA-256: 04d6f960c730d6b7cd8e161bd0fe258eb1a33d8e817c7f9a412cfd8b0537646e
font_03_sfnt_off00015d33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15D33 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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