Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b6214a37568315a…

MALICIOUS

PDF

75.9 KB Created: 2021-09-09 07:05:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 130755df42c483567169ba1f7697725b SHA-1: 75e90289adf941b61aa540f15f869c42ffc47da3 SHA-256: 2b6214a37568315ac58a34f3d68ba1dd68d9beb3a7f75fc5245e2acedaddbbc4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, directing users to multiple external URLs, some hosted on compromised CMS platforms. The presence of numerous unknown URLs suggests a phishing or malware distribution campaign, likely initiated via spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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 http://keralastatetailorsassociation.com/userfiles/file/wubetujoderujeboro.pdf In PDF document text
    • https://markyatirim.com/resimler/files/zokuzan.pdfIn PDF document text
    • http://integrotech.eu/zdjecia/file/tutirojerewat.pdfIn PDF document text
    • https://pierreseche.fr/userfiles/file/gojibaboxup.pdfIn PDF document text
    • http://puisan.ru/uploads/file/93224688639.pdfIn PDF document text
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613572e27b3d2---xajufirifatuvekukitoras.pdfIn PDF document text
    • http://appli-veolia.net/ckfinder/userfiles/files/wodesorezozufugenaga.pdfIn PDF document text
    • http://consoles-a-gagner.com/fckeditor/userfiles/file/77660283426.pdfIn PDF document text
    • http://ewtch.com/upload/files/taposuvuvikofofax.pdfIn PDF document text
    • https://ms02bet.net/contents/files/nusaxizixekuvubifevop.pdfIn PDF document text
    • https://innovativallatgyogyszer.hu/fileok/file/wezulasutoram.pdfIn PDF document text
    • http://ciccioinpentola.com/userfiles/files/midorobino.pdfIn PDF document text
    • http://ontheedgeofnow.com/wp-content/plugins/formcraft/file-upload/server/content/files/161362c7bb8621---38326259991.pdfIn PDF document text
    • http://edallyshop.com/upload/files/popovozexavulorevepijula.pdfIn PDF document text
    • https://www.zaantraining.nl/wp-content/plugins/formcraft/file-upload/server/content/files/161325d65212f1---firotolazedopofunejupe.pdfIn PDF document text
    • https://equinox-e.com/upload/UserFiles/file/17011593500.pdfIn PDF document text
    • http://debrecen.varosom.hu/userfiles/files/zivevaxixi.pdfIn PDF document text
    • https://allmassage.net/upload/file/20210909110500.pdfIn PDF document text
    • https://marathonroller.com/userfiles/files/saxujejumifedupozoro.pdfIn PDF document text
    • https://www.pessin-location.fr/ckfinder/userfiles/files/rirevatunosiwabofiv.pdfIn PDF document text
    • http://stauarchitetti.eu/userfiles/files/9307383927.pdfIn PDF document text
    • http://fortwashington.abwingsmd.com/uploads/files/mebimudizizulabimolenenob.pdfIn PDF document text
    • http://playitdirect.ca/ckfinder/uploadfiles/files/gonisawugebisisun.pdfIn PDF document text
    • http://cuanhuadanang.vn/uploads/image/files/kojunawesavofumamaruk.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=vector+calculus+and+fourier+series+pdfPDF 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_off0000c2fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC2FB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000db0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB0D 17604 bytes
SHA-256: b141034906db4290c91c23913074f0c805e7c1ae986334fc02bd972159270391
font_02_sfnt_off000108f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108F4 10680 bytes
SHA-256: 7178672b57a18fd6087be5d84850dfd338cad0da0466431bbfbda98f3fac8f89

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