Malicious PDF — malware analysis report

Static analysis result for SHA-256 02f0e3fbe64f1950…

MALICIOUS

PDF

79.7 KB Created: 2021-09-08 04:50:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: c3a0aef07e32476f683b5df3a610c6e6 SHA-1: 2ee45513ea41177652a295a5d1cfba1f71438c64 SHA-256: 02f0e3fbe64f195059a74619c43b0a2ef6ffc2891e5d20b1c1ccb2ddd0b7a7ed
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was identified as malicious by ML classifiers and ClamAV, flagging it as a phishing trojan. It functions as a link farm, containing numerous URLs that point to other PDF files hosted on compromised websites. The primary purpose appears to be directing users to malicious content, likely for phishing or further malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://workinhotel.com/upload/fckfile/denasapekurizug.pdf In PDF document text
    • https://moniimpex.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098eff1b6a8a---pesadiwivuzesimulobokefa.pdfIn PDF document text
    • http://dalnoboy.org/data/filestorage/upload/files/joguwakatojizorigirobe.pdfIn PDF document text
    • https://perfecthospital.net/FCKeditor/file/66259321920.pdfIn PDF document text
    • https://ev-owners.jp/userfiles/files/dipapa.pdfIn PDF document text
    • https://xn--90ah6akb9e.xn--p1ai/f/file/wuruwunoz.pdfIn PDF document text
    • https://avvocatoboretti.it/file/32484899335.pdfIn PDF document text
    • https://k-kompany.ru/wp-content/plugins/super-forms/uploads/php/files/5bcc5e5a0853c0aa91e62d8acc137a6c/kepedosekomolabanisumurev.pdfIn PDF document text
    • http://asbufestival.com/uploads/FCK_files/file/39315118136.pdfIn PDF document text
    • https://almondzwealth.com/administrator/imagetemp/file/65034363346.pdfIn PDF document text
    • https://institut-arabe.org/ckfinder/userfiles/files/12615874811.pdfIn PDF document text
    • http://xn--80adpfaaeictf0c6c7i.xn--p1ai/public/file/65755298749.pdfIn PDF document text
    • http://parmalab.it/userfiles/files/pibelotivubipexepusazu.pdfIn PDF document text
    • http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607015ab28d9a---12437293901.pdfIn PDF document text
    • http://veronicanealhome.com/wp-content/plugins/formcraft/file-upload/server/content/files/2/160d7986b06bc1---tewalorilofaxepuketedatej.pdfIn PDF document text
    • http://cameronhaddock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c14b2a93796---50705266001.pdfIn PDF document text
    • http://www.leasebridge.com/CKUPimg/files/2563879632.pdfIn PDF document text
    • http://3suntech.com/UploadFile/file/20210726120324593.pdfIn PDF document text
    • https://www.burit.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a49c98a07c1---52020880342.pdfIn PDF document text
    • http://elturo.ru/img/upload/files/12391405745.pdfIn PDF document text
    • https://givemeit.ru/wp-content/plugins/super-forms/uploads/php/files/ffdc25f2386caa8e1089b9958d5622b9/kafubamamixu.pdfIn PDF document text
    • http://gowowdeli.com/uploads/files/nowejomalas.pdfIn PDF document text
    • http://yuseigachi.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a972a760ca0---27934351890.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=adding+subtracting+radicals+worksheet+answersPDF 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_off0000d105.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD105 11048 bytes
SHA-256: 502a01693e7d23ca38b1771a52282fe13aefff6c372b7b389ad6b35bdeae1af6
font_01_sfnt_off0000ea96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA96 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000102a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102A8 17980 bytes
SHA-256: 519f91c5dda1abedd58875a27aff23cd77c1e3943560a4be4864ff6f632946ca

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