Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb8a64a13d869cfe…

MALICIOUS

PDF

81.8 KB Created: 2021-09-05 02:30:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 725a43e8e599d97a48bf6ae523eac99b SHA-1: a5f5661041757033577b1dab86eedb9f9aba7654 SHA-256: eb8a64a13d869cfec263303672462fe3e11a693cbe59ade6eeb1e1bdb8b99572
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://ltgtrends.com/wp-content/plugins/super-forms/uploads/php/files/0a25873edea1686f659c08b561d57f8a/71714878031.pdf In PDF document text
    • https://ivanamihic.com//files/23259655193.pdfIn PDF document text
    • http://chapelguild.com/images/usr/82282074233.pdfIn PDF document text
    • http://libertyquad72.fr/userfiles/file/midaxufamikel.pdfIn PDF document text
    • http://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/16126f5aa5c0a2---10290704541.pdfIn PDF document text
    • http://chromavials.com/d/files/sawilixisudewabofiri.pdfIn PDF document text
    • http://averon.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a13823d07da---wedebexarosapegik.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/riviwuxogojovavabir.pdfIn PDF document text
    • http://drvision.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607a4bab7d283---21591018667.pdfIn PDF document text
    • https://socialacademy.gr/wp-content/plugins/super-forms/uploads/php/files/3d7770ce3823e8f16ec9ce4543b2cfc7/kisokenagumuwob.pdfIn PDF document text
    • http://moskvaznaet.ru/upload/files/gakiramidupa.pdfIn PDF document text
    • https://www.gullyracing.it/admin/ckfinder/userfiles/files/zitopidisepit.pdfIn PDF document text
    • http://www.nanodrywash.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0c409bf406---bibadikoxixixekekulof.pdfIn PDF document text
    • http://pvsystreports.com/wp-content/plugins/super-forms/uploads/php/files/dtmtq9inpj5ic1s7l3jt2gtpj7/vaxafobatakerivupopajiniv.pdfIn PDF document text
    • http://clubmaniacr.com/campannas/file/88676990106.pdfIn PDF document text
    • http://willtorock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8a081ba6c1---tizule.pdfIn PDF document text
    • https://www.mobytec.com.br/mobytec/wp-content/plugins/formcraft/file-upload/server/content/files/160a7ad846302a---16232025859.pdfIn PDF document text
    • http://progettogeometra.it/userfiles/files/32694196956.pdfIn PDF document text
    • http://nsdadventist.org/FCKData/file/63890814996.pdfIn PDF document text
    • http://www.commandinglife.com/wp-content/plugins/formcraft/file-upload/server/content/files/160896943aff8c---lotaseruvufelalewamasive.pdfIn PDF document text
    • http://senn1962reunion.com/clients/2/2f/2fc2c703930c5c120d54ce0350dd22c7/File/65521446537.pdfIn PDF document text
    • https://www.paparazzirestaurant.com.au/wp-content/plugins/super-forms/uploads/php/files/9453466fa56310a5aeafd81490f6c1bd/pinijiximupedopabo.pdfIn PDF document text
    • https://brickbodysupplements.com/newerac2c/userfiles/file/35674203551.pdfIn PDF document text
    • http://opalbiosciences.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c0961e2ab8---dazidefewepaxexorexas.pdfIn PDF document text
    • https://kozmetikadunakeszi.hu/userfiles/file/76370065619.pdfIn PDF document text
    • https://paklya.su/design/img/upload/file/48550436042.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=obat+muscle+relaxant+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_off0000d9fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9FE 17856 bytes
SHA-256: e649a5fed7ccd85b44e0769101f87eccc315777e1d0a3a464e1f2419b7755477
font_01_sfnt_off0001083e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1083E 10936 bytes
SHA-256: f4b862bba24d8a7bc676184f4946fb83af1e69cd62e9057fac11fb5cc134b766
font_02_sfnt_off00012181.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12181 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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