Malicious PDF — malware analysis report

Static analysis result for SHA-256 d147d018cfe3e5a6…

MALICIOUS

PDF

91.3 KB Created: 2021-07-14 01:24:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: dd8917af0198a88fa83063e6370d8ec0 SHA-1: 2650d0cd7ce3a672f7a24d552854a95e13c66191 SHA-256: d147d018cfe3e5a6e04a7bd40df0fc10bb7d4f5aff0e6b2cb4bc67597b60b8b5
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected as malicious by ClamAV and an ML classifier, and it contains embedded JavaScript. The PDF also includes numerous external URIs, many pointing to compromised CMS uploads or disposable hosting, suggesting a link farm designed to redirect users. The embedded JavaScript likely facilitates the redirection or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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=play+is+the+work+of+childhood+quote PDF link annotation
    • http://igorodstore.ru/files/userfiles/files/xulisevu.pdfIn PDF document text
    • https://www.3dreamchurch.com/wp-content/plugins/super-forms/uploads/php/files/9087f6f982e12431b73607ce0970fbed/tarerij.pdfIn PDF document text
    • https://batikatravels.com/userfiles/file/xokamowok.pdfIn PDF document text
    • https://neoville.ru/wp-content/plugins/super-forms/uploads/php/files/abf4a73be9efdd982a41f90ffd5ff776/zogozijato.pdfIn PDF document text
    • https://marathonblainville.com/userfiles/files/lemowig.pdfIn PDF document text
    • https://ebooksweb.net/files/file/remepabumijofagir.pdfIn PDF document text
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a8e5a885998---35252150671.pdfIn PDF document text
    • http://regalmotors-jp.com/js/upload/files/togulonizubu.pdfIn PDF document text
    • http://tsg-edinstvo.ru/userfiles/file/55272935901.pdfIn PDF document text
    • https://thinkhigh-tech.com/d/files/dorepepobufemixovodanix.pdfIn PDF document text
    • http://toeicspeaking.net/_UploadFile/Images/file/95272630973.pdfIn PDF document text
    • https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160afdc1cc66c6---65691817197.pdfIn PDF document text
    • http://www.rlktechniek.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c87f3b44fbb---magibipig.pdfIn PDF document text
    • http://becro-plast.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160b9e11ba82e5---xivitateputubozifasu.pdfIn PDF document text
    • http://hillcountryawningsandsunscreens.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607979107ba5a---81544021753.pdfIn PDF document text
    • https://facades-et-traditions.com/actualites/file/31644090212.pdfIn PDF document text
    • http://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/b1aec41800fd4f0e49e6d47d853cc79b/12847598592.pdfIn PDF document text
    • http://veterina-hrib.cz/user-uploads/files/12256230183.pdfIn PDF document text
    • https://www.hdontheroadnapoli.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607de0924b6d0---5721257431.pdfIn PDF document text
    • https://californiaoptionsrealestate.com/wp-content/plugins/super-forms/uploads/php/files/396f3a0f107f70d90bf03767f685ad0a/63129032494.pdfIn PDF document text
    • http://moorheadhigh1970.com/clients/c/c3/c3beaea4c2dff0dfe15f0c96d12524a1/File/nulatamojawubupugo.pdfIn PDF document text
    • https://bhsbeacon.com/FCKeditor/file/54653723432.pdfIn PDF document text
    • https://asiaviews.org/wp-content/plugins/super-forms/uploads/php/files/7ocnoip597kgbrg9elgt2qmms2/10664118614.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_off000102c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102C1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011ad8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AD8 11008 bytes
SHA-256: 12301a36360596495c0cb0bcc0b8a5195180b737f061ffff054f67f1cdb3f213
font_02_sfnt_off00013480.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13480 16704 bytes
SHA-256: e3de31b1630d9a4b408c21482c50b2edbab9caa0e4c85f76996f4a1a0d868a84