Malicious PDF — malware analysis report

Static analysis result for SHA-256 01561afbdbb2f01c…

MALICIOUS

PDF

86.0 KB Created: 2021-09-01 11:13:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 3ded74663172fa3f2a7a1bed58463274 SHA-1: c7ddfe07d94733ce89bc1ff44bc09b21246d4ad4 SHA-256: 01561afbdbb2f01c94978a1b068f1875e096be96bd6eb0bd4c97f253cc2371d6
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to various websites, many of which appear to be compromised or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The presence of multiple external URIs and link farm heuristics confirms the document's primary function is to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://drafthe.ru/uplcv?utm_term=surah+yaseen+text+download+in+english PDF link annotation
    • https://www.aifimm.it/admin/inc/ckfinder/userfiles/files/fenosokotinunidamifukevu.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/1610628ea5f534---pusoriwenozevulabesanened.pdfIn PDF document text
    • https://fotoprint.lv/downloads/file/nefidadisapixide.pdfIn PDF document text
    • https://www.criteriainvest.com.br/wp-content/plugins/super-forms/uploads/php/files/smdi1qkq2ahanuujuisec2e2c1/75390573369.pdfIn PDF document text
    • https://mashtalkandil.com/userfiles/file/kerutebezameb.pdfIn PDF document text
    • http://bogelaipigeon.com/upload/file/34374329998.pdfIn PDF document text
    • http://suleymanporoy.com/img/userfiles/files/35508611022.pdfIn PDF document text
    • https://realestateconnect.us/wp-content/plugins/super-forms/uploads/php/files/8i2ljt9hmqfij3t680lhfa1733/51010297190.pdfIn PDF document text
    • http://ajivikafinance.com/userfiles/file/latewibifekuperajajizi.pdfIn PDF document text
    • http://alpha-th.com/userfiles/file/45962621742.pdfIn PDF document text
    • http://svsteinfurth.de/radsportfiles/file/41397675184.pdfIn PDF document text
    • http://thehawthornnyc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607dc81e0f145---tipigusironolepek.pdfIn PDF document text
    • http://skncn.com/u/files/fizubodinaruvulel.pdfIn PDF document text
    • https://www.finestkindcharter.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ef3b805471---xetejojodatadebome.pdfIn PDF document text
    • http://kirche-treuen.de/UserFiles/File/vofozusofe.pdfIn PDF document text
    • http://xn--90afqerdlt1f.xn--p1ai/admin/ckfinder/userfiles/files/regobudeguruzelopurizevug.pdfIn PDF document text
    • http://xn----dtbfdwc0aaaev8k.xn--p1ai/ckfinder/userfiles/files/66996699588.pdfIn PDF document text
    • https://incoyun.com/calisma2/files/uploads/gavekadukowotef.pdfIn PDF document text
    • http://mixline.ru/img/lib/file/50870661319.pdfIn PDF document text
    • http://regimhotelierbucuresti.com/images/userfiles/55120181220.pdfIn PDF document text
    • https://hiampelectric.com/wp-content/plugins/super-forms/uploads/php/files/0d4a4328cf033d46e8f71853fa76a9bf/kaxezaxerusadexapo.pdfIn PDF document text
    • https://airflow-skateboards.com/userfiles/files/ganotesimakafuxiwoniw.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_off0000e4e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4E4 11004 bytes
SHA-256: 3f9323a0f94ae6531c9996797df6b9d04a8c6c606b9ef8c0630f253dba84b512
font_01_sfnt_off0000fe41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE41 19996 bytes
SHA-256: f7b036937db12a7dca9839897731a40e4445bc88c0196acfd5df9a67b5cae1c4
font_02_sfnt_off000131f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131F6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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