Malicious PDF — malware analysis report

Static analysis result for SHA-256 254637f36c8fce5c…

MALICIOUS

PDF

79.1 KB Created: 2021-09-19 21:24:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: a96e9860e935421ba54d3b1e35c701d7 SHA-1: 701171c5aa8539d05767073ff4b63898208ac929 SHA-256: 254637f36c8fce5c0d4641de296d6e7d290e2f438ec2d53596666dd6d2d9274a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of techniques used to deliver second-stage payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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 https://pistant.ru/uplcv?utm_term=among+us+for+laptop+free+download PDF link annotation
    • http://cargologicru.com/sadm_files/71929442017.pdfIn PDF document text
    • http://www.sarajevo-inn-grunewald.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612e9bfc1b258---33609830842.pdfIn PDF document text
    • https://smartech.lv/sites/smartech/uploads/documents/files/84858823866.pdfIn PDF document text
    • http://21cedu.com/pds/userfiles/files/5103775181.pdfIn PDF document text
    • http://luisacortesearchitetto.it/userfiles/files/raxujim.pdfIn PDF document text
    • https://ms2oke.com/contents/files/nubalexinaluwanukomabita.pdfIn PDF document text
    • http://lmalaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/zekutavatuwagaz.pdfIn PDF document text
    • https://www.ftha.org/admin/ckfinder/userfiles/files/teraz.pdfIn PDF document text
    • https://naveenent.com/administrator/imagetemp/file/kavofeline.pdfIn PDF document text
    • http://tfe-design.dk/userfiles/file/9102868873.pdfIn PDF document text
    • https://kuepancong.com/contents/files/83976186742.pdfIn PDF document text
    • http://soleilboo.com/images/uploads/files/54160161148.pdfIn PDF document text
    • https://fisheaglesafaris.net/pics/user/file/79769704830.pdfIn PDF document text
    • http://lev-steklo.ru/userfiles/file/gevesobase.pdfIn PDF document text
    • https://abhrian.com/userfiles/files/werazamimipijugopuku.pdfIn PDF document text
    • http://chickenwild.com/upload/contents/images/images/63965344259.pdfIn PDF document text
    • http://ctcinsulator.com/uploads/file/26339731298.pdfIn PDF document text
    • https://moniimpex.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135eb3904d93---puzuweja.pdfIn PDF document text
    • https://vibingvibes.com/userfiles/files/32450980649.pdfIn PDF document text
    • http://lotuscourtpune.com/wp-content/plugins/super-forms/uploads/php/files/308a8fad63c86e6d308176c04c7df1bc/32962670057.pdfIn PDF document text
    • http://www.icf-plant.com/files/file/gixitejaxozorad.pdfIn PDF document text
    • http://zdrowejaja.com/Upload/file/xibatipugofis.pdfIn PDF document text
    • https://shevtsov-art.com/uploads/files/ginejapatunumozibuw.pdfIn PDF document text
    • http://dialog-seversk.ru/jsplugins/ckfinder/userfiles/files/10348320300.pdfIn PDF document text
    • http://chinasoftcore.com/userfiles/file///wigexuxoze.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_off0000cf16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF16 10916 bytes
SHA-256: 9a5ea7655b995a28cbe887b120a2dc01f083f7c0148c31f5e2eab8bacd08ec10
font_01_sfnt_off0000e849.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE849 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001005b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1005B 17656 bytes
SHA-256: 55a246f4e58dd2961adb645ff1c657d848a06dffc8e307b7dd816348800a2782

Open this report in the interactive analyzer, or submit your own file for analysis.