Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ba116436219b496…

MALICIOUS

PDF

85.9 KB Created: 2021-06-25 21:57:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 663d845dfb39f2d8aa72eb723b65041c SHA-1: f8211d9fa0ad6ab20b5527497f9c9fde174ff5b5 SHA-256: 5ba116436219b4969c3c60f528286bd3b135bafac7d9cd6888735e4794da8bb5
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a link farm with numerous URLs pointing to compromised WordPress sites, likely intended to lure victims through SEO poisoning or phishing. The ML classifier strongly indicated maliciousness, and the structure suggests it's designed to redirect users to external content. No scripts were extracted, limiting the analysis of direct execution capabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

Heuristics 5

  • 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://e-lightingcontrols.com/wp-content/plugins/super-forms/uploads/php/files/abc594ee1e61b137459cd7b47f2ddc3e/vezogegi.pdf In PDF document text
    • https://www.prestigeautobody.com.au/wp-content/plugins/super-forms/uploads/php/files/1aa3e6c8cb680497d9e82f282d6bdfc1/88519595084.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/d4b6e2943751a441788d441c8c47e084/93088673102.pdfIn PDF document text
    • https://jollytime.ru/wp-content/plugins/super-forms/uploads/php/files/297e286dc014a19d5a2577d3c3f299fc/73623926375.pdfIn PDF document text
    • https://watertorens.nl/userfiles/file/77330245459.pdfIn PDF document text
    • https://lederstuhlshop.de/ckfinder/userfiles/files/zanazamixetamit.pdfIn PDF document text
    • https://joefairless.com/wp-content/plugins/super-forms/uploads/php/files/728973b944053f97e24561dd61677485/25369619168.pdfIn PDF document text
    • https://www.mozartcantat.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16076c86cb5aaa---17059852782.pdfIn PDF document text
    • http://unipell.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160d1c79c6ac31---27712947885.pdfIn PDF document text
    • https://kvartira-zalog.ru/wp-content/plugins/super-forms/uploads/php/files/c714b9aed6d254d81fc57b69c895efaf/xuwagasujevitofer.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a921eb86932---63127643272.pdfIn PDF document text
    • https://gamletaarnhuset.no/wp-content/plugins/formcraft/file-upload/server/content/files/1607d19c07dba5---newexixe.pdfIn PDF document text
    • http://digemnd.com/UserFiles/file/44515629815.pdfIn PDF document text
    • https://web-sila.ru/wp-content/plugins/super-forms/uploads/php/files/843a73ba2058ff3ddd8467d17ddcb9c1/fipuxixav.pdfIn PDF document text
    • https://ccveg.org/wp-content/plugins/super-forms/uploads/php/files/16vvj2f22j0d70ek74o2jd6gfp/29628182063.pdfIn PDF document text
    • http://alfavit.tv/userfiles/file/9100487457.pdfIn PDF document text
    • http://vankouwenenmastop.nl/UserFiles/file/40467493094.pdfIn PDF document text
    • https://www.mercedesbenzofaustinservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2b20ee36d3---punaxol.pdfIn PDF document text
    • https://baxsporthorses.com/userfiles/file/momesukuwudonomeror.pdfIn PDF document text
    • http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c278161ab43---wegadazumarapizuv.pdfIn PDF document text
    • https://postscriptproductions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc87ecb4818---nerokumumera.pdfIn PDF document text
    • http://www.marcelasemper.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cb78772f3fc---xizilenisekajeniwixebabe.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=does+sparkling+ice+break+a+fastPDF link annotation
    • 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_off0000eca8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECA8 17016 bytes
SHA-256: 21b4231a8337f4aa6b23d3c256ee929d20af1319ae30ea694ee2f0d3733496a3
font_01_sfnt_off000118f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118F4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001310b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1310B 10888 bytes
SHA-256: aad62ce0585bd6d6c07423e176bbab60f226c336514f2b652f909d7088cb2167

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