Malicious PDF — malware analysis report

Static analysis result for SHA-256 122f202e336b5e63…

MALICIOUS

PDF

88.9 KB Created: 2021-07-01 00:21:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 1d93937fbe96b3f0db705e638aee2401 SHA-1: 4b605a3b836a59a81f66c2a3960817a8abe3a2c6 SHA-256: 122f202e336b5e63e055f73263830a2616e591a1b8d3f43fc8a3b0e2f1ed6720
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to compromised WordPress sites and disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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://ketchas.ru/uplcv?utm_term=what+is+absolute+zero+temperature+in+physics PDF link annotation
    • http://angelojrobles.com/admin_initial_test/userfiles/file/66948058134.pdfIn PDF document text
    • https://melz-feu.ru/upload/76464906331.pdfIn PDF document text
    • https://www.rockandroll.blog.br/wp-content/plugins/super-forms/uploads/php/files/dt1oeglf87h0309548h21iuhg1/46911669227.pdfIn PDF document text
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a41bc9b404b---povorabu.pdfIn PDF document text
    • http://objetivovender.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f6dcc4b3ce---jajadog.pdfIn PDF document text
    • http://geo-equipe.it/userfiles/files/kajekazirusikobuxa.pdfIn PDF document text
    • http://rufullthrottle.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a5de06b48a---wulexamidemeluv.pdfIn PDF document text
    • https://www.democratum.com/wp-content/plugins/super-forms/uploads/php/files/94863a354fa91c4dcb16a4f1e30e5a34/gabukobededaruvuwar.pdfIn PDF document text
    • http://ventilyatsia-v-sochi.ru/ckfinder/userfiles/files/wudigibodakokidepifas.pdfIn PDF document text
    • http://zamokugrofa.sk/admin/fckeditor/file/52694903102.pdfIn PDF document text
    • http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160911bd0b139b---wepos.pdfIn PDF document text
    • https://korovin.org/site/img_ufiles/gawubanisovokezab.pdfIn PDF document text
    • https://shotclock.ca/wp-content/plugins/super-forms/uploads/php/files/af5f71a01c4c51a86918d2a50ace48e6/ravewopupizigo.pdfIn PDF document text
    • http://seabeachthailand.com/UserFiles/file/nalotupimazilibusawodu.pdfIn PDF document text
    • https://pabrikangka.com/contents//files/2324307938.pdfIn PDF document text
    • https://aartipalette.com/userfiles/file/pamifozetokivepa.pdfIn PDF document text
    • https://vallejardin.com/wp-content/plugins/super-forms/uploads/php/files/219a56fad4ca0e49312980d51de2a7a4/38300054590.pdfIn PDF document text
    • http://bergfin.se/wp-content/plugins/formcraft/file-upload/server/content/files/16075cf94920f3---44412061994.pdfIn PDF document text
    • https://lamaisonducoeur.ca/upload/editor/file/pifugol.pdfIn PDF document text
    • http://kingspec.su/wp-content/plugins/super-forms/uploads/php/files/vh42vq9vdcfg6gbtus30h42tit/rizalulovat.pdfIn PDF document text
    • https://securitydm.com/slicice/file/pelanelilonilelexasasin.pdfIn PDF document text
    • https://www.costaverde.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608cb34fc6639---90527304646.pdfIn PDF document text
    • https://visionbrindes.com/admin/fckeditor/userfiles/file/4572675583.pdfIn PDF document text
    • http://ferrogep99.hu/static/media/file/63309739015.pdfIn PDF document text
    • http://www.farparts.cl/wp-content/plugins/formcraft/file-upload/server/content/files/1607fe34d2513e---10632567760.pdfIn PDF document text
    • http://newgrids.com/userfiles/file/zaniwazanokutoxa.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_off0000f66d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF66D 17496 bytes
SHA-256: cf80426ddf516bc48d6db9dbfe526f09f1abef5bceabe13d672200624824079f
font_01_sfnt_off0001246c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1246C 11048 bytes
SHA-256: 2754fbef616b70036075d932b3d8a9a709f2421f1d5c5c2b2302cbe554203115
font_02_sfnt_off00013dd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13DD5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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