Malicious PDF — malware analysis report

Static analysis result for SHA-256 70f282bd4017ab2d…

MALICIOUS

PDF

93.7 KB Created: 2021-09-01 08:20:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 29f723cab5b4cddd51328e295e8ce4c8 SHA-1: f51a4b9517e59545278898a0f7cb476b357c60ba SHA-256: 70f282bd4017ab2d22327272289a06b59192272e9cee6d7a3824678622c32d6b
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1055.012 Process Injection T1204.002 Malicious File

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, with multiple URLs pointing to compromised WordPress sites hosting PDF files. These links are likely intended to redirect users to malicious or phishing content, potentially leading to further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8932

Heuristics 5

  • 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
  • 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://bringem.de/wp-content/plugins/super-forms/uploads/php/files/ca44d40c969fe47cdbd5bff4d59f68fb/bugulapozafeb.pdf In PDF document text
    • https://dacoma.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1606d952f8aeaa---46612059856.pdfIn PDF document text
    • https://sandzak.best/wp-content/plugins/super-forms/uploads/php/files/ff27092ea1761be9b5ff1369df1b3c79/96194282519.pdfIn PDF document text
    • http://www.saraviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a5f41c934b---27453973705.pdfIn PDF document text
    • http://accurateverdicts.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607940c1c8b3c---zetojesarapatavafijiw.pdfIn PDF document text
    • http://ampletrekking.com/userfiles/file/feledexuzuwod.pdfIn PDF document text
    • http://argra.rs/wp-content/plugins/formcraft/file-upload/server/content/files/1606d13cb10dd4---desirikatawerotabenotor.pdfIn PDF document text
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16070cdbf59ffb---ripekusidubujag.pdfIn PDF document text
    • http://bodybybodyology.com/ckfinder/userfiles/files/89746062798.pdfIn PDF document text
    • https://oknoplus-omsk.ru/wp-content/plugins/super-forms/uploads/php/files/edb37d6a1e2a6c26ca4d4795bbb0a9a5/tasadesu.pdfIn PDF document text
    • http://mdfgiare.com/upload/files/jekubinevonobobugowise.pdfIn PDF document text
    • https://medtek.vn/storage/file/93994952644.pdfIn PDF document text
    • https://www.kadeavenue.com/wp-content/plugins/super-forms/uploads/php/files/fbcad2a01d26c99b634c84515b5cf579/gaduliro.pdfIn PDF document text
    • http://curry-box-deluxe.de/userfiles/file/tebudul.pdfIn PDF document text
    • http://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab871b1d6c6---7693268267.pdfIn PDF document text
    • https://leo-translate.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/1608ae89a3298f---nexojimul.pdfIn PDF document text
    • http://mail-ex.net/userfiles/file/92298779158.pdfIn PDF document text
    • http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160895d835813f---38074420593.pdfIn PDF document text
    • https://hssanesteban.cl/files/71274688388.pdfIn PDF document text
    • http://schouteninterieurwerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609107fe456f7---zakesisekole.pdfIn PDF document text
    • http://vln.nl/files/file/tinuxegomirezigeronikowit.pdfIn PDF document text
    • http://test.uebersetzungen-nesselberger.de/wp-content/plugins/formcraft/file-upload/server/content/files/16126d2fd5ed05---25334639226.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=second+fastest+land+animalPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00014ee6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14EE6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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