Malicious PDF — malware analysis report

Static analysis result for SHA-256 647448dd3268bee2…

MALICIOUS

PDF

84.7 KB Created: 2021-08-30 03:31:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 17a975c9bba11eb781b9d2da3f296435 SHA-1: ee80166330ce0f1a20282c0ea90e6ebc668d086b SHA-256: 647448dd3268bee27bdbbaecbf7f3b3c6effa491490517240f7263ee7d2ef5b2
156 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious. It functions as a link farm, containing numerous URLs that point to compromised WordPress uploads and other disposable hosting. These links likely lead to further malicious content or phishing attempts.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9962

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://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/161002db354a84---bovodufago.pdf In PDF document text
    • https://www.frontierexim.com/wp-content/plugins/super-forms/uploads/php/files/359b6b6lrjm9a4in3ct1giq37p/mesifo.pdfIn PDF document text
    • https://bokseinstituttet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16084f4fbae7fc---19396896107.pdfIn PDF document text
    • http://dostavkaturov.ru/files/file/38446116031.pdfIn PDF document text
    • http://fine-cottage.ru/userfiles/files/wabolutekuw.pdfIn PDF document text
    • https://k-kompany.ru/wp-content/plugins/super-forms/uploads/php/files/677e2c867d6ce7ce709f26a25abf71a4/libelute.pdfIn PDF document text
    • https://lakecountyoralsurgery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2150374f61---31580408611.pdfIn PDF document text
    • http://mattstergamer.com/wp-content/plugins/super-forms/uploads/php/files/b7dmocik7lddtk21s9auf71mm5/76905378953.pdfIn PDF document text
    • https://fatheragneliti.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e92743d4dab---65117975400.pdfIn PDF document text
    • http://pune-india.info/userfiles/file/60261100156.pdfIn PDF document text
    • http://yaqeen-eg.com/userfiles/file/solidif.pdfIn PDF document text
    • http://fouladsazanco.com/Upload/file/dolejolewom.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/160987a4207016---27847541806.pdfIn PDF document text
    • https://www.allterra.group/wp-content/plugins/super-forms/uploads/php/files/6dc85e21665e84d96adc99b020ac115f/tezitu.pdfIn PDF document text
    • https://ises.ca/phpsites/vertical_living/uploads/file/74652167109.pdfIn PDF document text
    • https://webupdate.ca/wp-content/plugins/super-forms/uploads/php/files/00r4gbcboce1c34u251m1bdkrq/kogozegu.pdfIn PDF document text
    • https://yarsan.ru/wp-content/plugins/super-forms/uploads/php/files/347b13c58b2834af91347c5aa5fa64dd/kifizuz.pdfIn PDF document text
    • http://glassick.com/userfiles/file/xovekomekakubujalopabatuk.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/a326dd3c44bf3aeac55f447c9a03adb3/4124679419.pdfIn PDF document text
    • https://mygrind.ie/userfiles/file/71535358345.pdfIn PDF document text
    • http://creaorganization.com/depo/sayfaresim/file/93419950111.pdfIn PDF document text
    • https://bbensonmft.com/wp-content/plugins/super-forms/uploads/php/files/d53eb5fe18c30b0a86b989ae0b246e88/sosipo.pdfIn PDF document text
    • http://portalcom-b2b.es/img/user///file/_0681632001628837866.pdfIn PDF document text
    • https://jclifeschools.org/wp-content/plugins/super-forms/uploads/php/files/b59703a8aa7430554bdc1e39e7aec5e9/55336706810.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=to+be+probedPDF 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c10a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC10A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d920.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD920 9816 bytes
SHA-256: 3324de1c99417697882a999d89316e15c5ae8bcb25bd951b2f3a34ddbf2032e2
font_02_sfnt_off0000ee6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE6D 20596 bytes
SHA-256: 5f9ad2979989916cec674749625319a071440ad929c07c0768ad8ed9a130bab0
font_03_sfnt_off000121b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121B9 2152 bytes
SHA-256: 119d8e66f1005d20cde8d2d85aa6f4a951ee0de1a33cbe3dfca849e0fa6b5cde
font_04_sfnt_off00012b5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B5D 16348 bytes
SHA-256: 8fcced7a8fcbf22d45689b44407ce1c1b45b78050135da208b7eeea4fc129b0d

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