Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6c14a49821d2ecd…

MALICIOUS

PDF

90.7 KB Created: 2021-06-29 00:01:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d2cca4d9259b8fa8347946ed04b642f1 SHA-1: 4192ec51733944a02b33c33d96e4df96714dcf02 SHA-256: c6c14a49821d2ecd091e4af60f15902f65991350e093e1a46e426e367e2374ed
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 and disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware via these links. The document body is heavily obfuscated and appears to be generated content rather than user-readable text.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://www.arc-welding.co.uk/wp-content/plugins/super-forms/uploads/php/files/7dptrqrm696a068t1ksrj79tr2/72050552614.pdf
    • http://vudafrique.com/wp-content/plugins/super-forms/uploads/php/files/7ecbe7b8dfa744f187cce597d558c58c/74412016204.pdf
    • https://sweetestspaparty.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8ef1a5b80e---vemusasi.pdf
    • https://ivanda-commerce.hr/userfiles/file/fofarob.pdf
    • https://beaumont-residence.com/wp-content/plugins/super-forms/uploads/php/files/n81rv251kolguhrjppabd1ddjo/vikiwilot.pdf
    • https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a2a8b197b65---44419910373.pdf
    • http://zzweien.com/d/files/8140768437.pdf
    • http://geredekombiservisi.com/userfiles/file/xotarulojo.pdf
    • http://yjsyrj.com/userfiles/file/gorazawibego.pdf
    • https://mindweave.co.uk/wp-content/plugins/super-forms/uploads/php/files/epjbq3b2lfg4gcqu6avse8fq9b/rameguxit.pdf
    • http://bilagroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099155801b13---20026384086.pdf
    • http://arc-en-cielproduce.com/ckfinder/userfiles/files/dasezujosaxufoduputusix.pdf
    • https://www.msolartop.cz/wp-content/plugins/formcraft/file-upload/server/content/files/160a5c7a826356---43638876326.pdf
    • https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e6bdf012b6---dubuwafizakumazux.pdf
    • http://bidmitt.com/img/files/file/wujulajebulurajalex.pdf
    • http://ziepniekkalns.lv/wp-content/plugins/formcraft/file-upload/server/content/files/1606dd6b60f477---15701633975.pdf
    • http://msci.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/160b34b2740e96---xotugibaderawi.pdf
    • https://itacademyindia.com/ckfinder/userfiles/files/saboke.pdf
    • http://www.psstrecno.sk/wp-content/plugins/formcraft/file-upload/server/content/files/160a8cbe1a1284---lobafetijavew.pdf
    • http://interwork.sk/userfiles/file/97265673482.pdf
    • https://theemperorsoldclothes.co.uk/wp-content/plugins/super-forms/uploads/php/files/3p7nj5jdrlojersq7tsk8s93lt/kenamoriwesawavegiwoxevit.pdf
    • http://asdgolfclubtoscana.com/writable/public/userfiles/file/39874093008.pdf
    • http://sakirnoopo.ru/wp-content/plugins/super-forms/uploads/php/files/7d98b91bc8fbf7b45e3cd725edc79ef1/14051315071.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=candy+factory+near+me
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000100c8.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x100C8 16792 bytes
font_01_sfnt_off000118df.bin
7112cf9439bfc1230648e5f1c5833d3d92d5f20a002133486888031721cc65e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x118DF 10476 bytes
font_02_sfnt_off000130b9.bin
d37eb99b30c90b0179e1477fe3762b2d655a426c7505968cda55f6d34a0dea67
pdf-font-stream PDF embedded font (sfnt) at offset 0x130B9 17332 bytes