Malicious PDF — malware analysis report

Static analysis result for SHA-256 242c448336b7ccd4…

MALICIOUS

PDF

87.4 KB Created: 2021-06-28 03:52:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: da670f1fb551e95a8246d8438aa4161b SHA-1: 17909e73b529b3a524c81cb8d6e6223b89590760 SHA-256: 242c448336b7ccd4ce724cc4f47449c54937b008bdbed0adbc26b206ab762e2d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to external websites, many of which are hosted on compromised WordPress sites or disposable domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the PDF structure and embedded URLs are indicative of a malicious lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://pixomot.ru/uplcv?utm_term=anthony+lai+barrister PDF link annotation
    • http://arniestribu.com/campannas/file/60897393676.pdfIn PDF document text
    • https://nationalcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b7baf0112d---70599994892.pdfIn PDF document text
    • https://pankalconstructora.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4c3f258763---38889028901.pdfIn PDF document text
    • https://www.criteriainvest.com.br/wp-content/plugins/super-forms/uploads/php/files/ok5d1ad84vd85av5iqeaou3n1u/tujizexemagekiw.pdfIn PDF document text
    • https://cruiseship.cruises/wp-content/plugins/super-forms/uploads/php/files/b1f0f6atrj5oqn925lj18ij005/43090943544.pdfIn PDF document text
    • http://www.finanzanlagen-honorarberatung.de/wp-content/plugins/formcraft/file-upload/server/content/files/16095e180ee6cb---tubovon.pdfIn PDF document text
    • http://shsalumniauditorium.org/clients/f/fa/fa32e32112b7cad64a7d7e78b95ed61b/File/tirolezux.pdfIn PDF document text
    • http://aklond.com/UploadFilesfile///2021052204491259.pdfIn PDF document text
    • http://shuswapladystriders.ca/userfiles/file/mapofujopamek.pdfIn PDF document text
    • http://www.anclupnapoli.it/userfiles/file/newoxedimemofira.pdfIn PDF document text
    • http://woonhuislift.info/wp-content/plugins/formcraft/file-upload/server/content/files/160d83bc60111b---pibetupafakuvusaru.pdfIn PDF document text
    • https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160a2c04db74e6---zibutajijozigiguvemaz.pdfIn PDF document text
    • http://bhs-class1957.com/clients/35434/File/tuzijisegam.pdfIn PDF document text
    • http://mamsn.com/upload/miwunuzivomupaz.pdfIn PDF document text
    • https://jjmassociates.com/wp-content/plugins/super-forms/uploads/php/files/b4047cf9803611b09ee66b0ecd377184/palivo.pdfIn PDF document text
    • https://mariellatriolo.it/public/file/56445783677.pdfIn PDF document text
    • http://apexnepaltravel.com/userfiles/file/rojabanaxadepexoduwi.pdfIn PDF document text
    • https://maugli24.ru/wp-content/plugins/super-forms/uploads/php/files/abb8c884d89140256ea4f97c3162b6da/vifenozi.pdfIn PDF document text
    • https://akapacha.com/userfiles/file/zobijuwubopawokarobubufe.pdfIn PDF document text
    • http://www.evisiontiendaonline.com/ckfinder/userfiles/files/39214617660.pdfIn PDF document text
    • http://www.qookspot.kitchen/wp-content/plugins/formcraft/file-upload/server/content/files/160c477a30b5dd---25837441587.pdfIn PDF document text
    • https://kultmotor.hu/images/files/37730486496.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/5aea73bf7bb6154eb2d5edc0a501dc9f/35651222033.pdfIn PDF document text
    • https://laxmigrouppune.com/wp-content/plugins/super-forms/uploads/php/files/94baaa92a3824f96f87051accaeb2710/xakibuwexemulona.pdfIn PDF document text
    • http://www.k-24.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c72d41eb11d---50371641599.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_off0000f13b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF13B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001094d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1094D 17436 bytes
SHA-256: 4bd94d53ea601681979dc4ff536c63c3f05ebb94ed9fc98ae5080414b6eb99f9
font_02_sfnt_off00013728.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13728 10440 bytes
SHA-256: f5fafaeb735d8dba4ddfaff2743c2de4f079c91213d4ee505945c087566de6e4

Open this report in the interactive analyzer, or submit your own file for analysis.