Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba341a5d061f30e0…

MALICIOUS

PDF

126.9 KB Created: 2021-08-26 01:00:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 63100390c98fcdd70512dde4e90186a0 SHA-1: e6783b42b6d5bd8e4e2f7ad487a94c1aa9d25d68 SHA-256: ba341a5d061f30e0c967b5207b34a7b6e26a5a8aba31e2b3db6bc6e837d95a88
156 Risk Score

Malware Insights

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

The file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution intent. It functions as a link farm, with numerous embedded URLs pointing to compromised WordPress sites and other disposable hosting. These links likely lead to further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://drafthe.ru/uplcv?utm_term=trusting+god+in+all+circumstances PDF link annotation
    • https://brusroom.com/wp-content/plugins/super-forms/uploads/php/files/64d73328b44646f75c0edf19e9b2d4e3/xuwomigusedenekipizikib.pdfIn PDF document text
    • http://digitalqwerty.com/ckfinder/userfiles/files/pasugisotedur.pdfIn PDF document text
    • https://www.lesson-online.org/wp-content/plugins/super-forms/uploads/php/files/39keapvgnn4u1g7klbta9it7k1/81743649018.pdfIn PDF document text
    • https://arbormaster.net/uploads/files/37061787674.pdfIn PDF document text
    • http://www.scmphotography.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a1aa23eaeaa---gamixaviwuzoz.pdfIn PDF document text
    • https://beaufortbond.com/wp-content/plugins/super-forms/uploads/php/files/9f5d44185381e9fab631762794d349e6/58505950221.pdfIn PDF document text
    • https://www.officinadelgustoroma.com/wp-content/plugins/super-forms/uploads/php/files/f89b32e77d62d57d409300326768347a/fajomodexigususepap.pdfIn PDF document text
    • http://www.darvidproperty.com/news/file/wonesabetojugewuzubedodek.pdfIn PDF document text
    • http://greenld.com/userfiles/87091522818.pdfIn PDF document text
    • http://ccmyungsung.net/userData/board/file/zutofiriboforadaz.pdfIn PDF document text
    • https://theshairpodcast.com/wp-content/plugins/super-forms/uploads/php/files/5e60db02e38561565a17bd5af5787877/jevawatok.pdfIn PDF document text
    • http://cnex.cc/images/blog//file/bikojagovo.pdfIn PDF document text
    • https://www.cfo-search.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c119c2ebb4c---lawebazobizolonimudomit.pdfIn PDF document text
    • https://ofertaromania.ro/ckfinder/userfiles/files/46397821212.pdfIn PDF document text
    • https://www.frankcapassoandsons.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a463717f519---71120575172.pdfIn PDF document text
    • https://sandzak.best/wp-content/plugins/super-forms/uploads/php/files/s7ds0n6uh1jvh4o6o8j5el0mnu/bemoro.pdfIn PDF document text
    • http://okna-dvere-online.cz/media/upload/upload/file/fizugiluzerolavejapi.pdfIn PDF document text
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/16072bad20a99e---57317330125.pdfIn PDF document text
    • http://melissajacksonmd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160712531cf8eb---21723059662.pdfIn PDF document text
    • https://wccia-vastu.com/wp-content/plugins/super-forms/uploads/php/files/76be04fa277e4d1e78251cf8f84d8a70/rojeguwutuketerawijiv.pdfIn PDF document text
    • http://zuche0551.com/upload/file/dotuxomulavitag.pdfIn PDF document text
    • http://lobi.md/userfiles/file/jopokukidevasemavogudowo.pdfIn PDF document text
    • http://wirheiraten.de/images/file/kekawibuvibosewexus.pdfIn PDF document text
    • https://mariellatriolo.it/public/file/64141624564.pdfIn PDF document text
    • https://worldkelo.com/wp-content/plugins/super-forms/uploads/php/files/6f70f89a41c6f66bd2c07031415ce5e8/gowefakilufemadogorigeju.pdfIn PDF document text
    • 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_off00018f72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18F72 17184 bytes
SHA-256: f7a60040105d3cbe4e214be139486f54dab7282024204d319d97c3cc0568aaaa
font_01_sfnt_off0001bc27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BC27 10776 bytes
SHA-256: 85dd40d22a299aef7cf16e81dc01b7b80814b7833b92e5051201dc9050a03e30
font_02_sfnt_off0001d4c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D4C0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1