Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a137d800ede5250…

MALICIOUS

PDF

143.4 KB Created: 2021-07-08 12:46:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e8ebb2a380f46db668db566fb62465a9 SHA-1: 631c1dc22c7bd5847a359f75d833596ee5173d81 SHA-256: 9a137d800ede5250d265ddaab6e80d990cc7e36af6d825770831925df6dbf7a0
196 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for Pdf.Phishing.Trojan. The document contains a link farm pointing to compromised WordPress uploads and other disposable hosting, suggesting an attempt to redirect users to malicious sites. The presence of 'cmdkv3b9has3/nemesunanenewujawixuzonob.pdf' and 'http://paymentsbu' within the document text further indicates a malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9913

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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://www.urbanwaterways.info/files/mumavunuzepiwexinad.pdf
    • http://www.abcklima.hu//data/editorfile/gaduwakomezenebefir.pdf
    • https://fcksa.com/ckfinder/userfiles/files/tirifar.pdf
    • https://www.plsok.com/wp-content/plugins/super-forms/uploads/php/files/02f5b0b8b731cd62ef646cbed171364f/nalotixevinoxujimasob.pdf
    • https://www.nestroots.com/wp-content/plugins/super-forms/uploads/php/files/mn1j3bm4ursou67f7q1i7t4or6/61426028172.pdf
    • https://www.abaco-engineering.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609b16f0b31bc---49084558683.pdf
    • https://weinquartier.at/wp-content/plugins/super-forms/uploads/php/files/130da55bbe31460dffdce16227e89508/xitoxepomu.pdf
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/1amiscdc5h7nd57igal4fq9qj7/warakulevi.pdf
    • http://albatrossmrn.com/konadnew/userfiles/file/gukeloviweluj.pdf
    • https://mziagroup.com/wp-content/plugins/super-forms/uploads/php/files/a8kt4q411on1nvcmdkv3b9has3/nemesunanenewujawixuzonob.pdf
    • http://paymentsbusiness.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160bb7a48b43aa---9104691359.pdf
    • https://next-engineering.com/userfiles/files/17838174119.pdf
    • http://www.finanzanlagen-honorarberatung.de/wp-content/plugins/formcraft/file-upload/server/content/files/160d6738b9dc32---26486524367.pdf
    • http://dobraukraina.org/sites/all/sites/dobraukraina.org/files/tokakitawebem.pdf
    • http://melissajacksonmd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a608be25d99---99083118331.pdf
    • http://italiangreyhound.pl/img1/userfiles/file/68236610302.pdf
    • https://www.physioaktivkramer.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a6a3c55d93a---86510730176.pdf
    • http://formpart.com/upload/ckfinder/files/tedawitesopozofevepokivu.pdf
    • https://www.medipratik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9b75eb8e7e---53223027031.pdf
    • https://www.chortho.co.uk/wp-content/plugins/super-forms/uploads/php/files/0mblo7q5j31632nr3nvc0q6ktv/91325891303.pdf
    • http://yer-krasnodar.ru/ckfinder/userfiles/files/zekubazelul.pdf
    • https://www.sacda.org/wp-content/plugins/super-forms/uploads/php/files/7b7hda75a11p3dsg2lnlfufo34/31719472570.pdf
    • https://bursaceviritercume.com/wp-content/plugins/formcraft/file-upload/server/content/files/160920e3d339cc---vuxuwixufo.pdf
    • http://ovartec.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5a90f12cc9---28567373344.pdf
    • http://paymentsbu
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=show+ip+interface+brief+example
    • 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_off0001cdc1.bin
b362c94be6e53a1a7b1b7f6e3c56a50db31bab7d6c86f17a2f82c21ac16e1391		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1CDC1 18412 bytes
font_01_sfnt_off0001fe7c.bin
dcceeb9a061117f666a1e01a52fd6fe971e298c6bbfd0278137c3af1f13dafcb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1FE7C 10980 bytes
font_02_sfnt_off000217ad.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x217AD 16792 bytes

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