Malicious PDF — malware analysis report

Static analysis result for SHA-256 130a390e55857093…

MALICIOUS

PDF

111.6 KB Created: 2021-06-26 07:58:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 2af3e2db43150dd4ad63689e164a50ff SHA-1: 22cf2aae9e9b7b01cf5b2c1b8a304ef800a780b4 SHA-256: 130a390e55857093d33a6544f169b78171dabaa375c27ad6d309d6ab01b168b5
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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 http://www.bufolari.com/public/immagini/file/71327301315.pdf In PDF document text
    • https://xlux.vn/wp-content/plugins/super-forms/uploads/php/files/jfrpmfv969tqfmnimcvtr3u0nk/8397011220.pdfIn PDF document text
    • https://bf-pomosch.ru/wp-content/plugins/super-forms/uploads/php/files/fsp975b7ra5ahfvvnjgkh21a84/meverolazukisizazisosave.pdfIn PDF document text
    • https://www.idromeccanicasrl.com/idromeccanicasrl.com/wp-content/plugins/super-forms/uploads/php/files/b6d21e8058fa6c8221a787af3be86fd1/6467784997.pdfIn PDF document text
    • http://aucoindeshalles.fr/menu/file/zatesali.pdfIn PDF document text
    • http://limpiasol.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a74f56de25d---71347130066.pdfIn PDF document text
    • http://boulderdivorcelaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086b27d6c296---giwemisetapaveruz.pdfIn PDF document text
    • https://noithatkuongthinh.com/uploads/files/pelukusidi.pdfIn PDF document text
    • http://urbanconstructions.org/images/uploadedimages/file/97099407338.pdfIn PDF document text
    • http://www.skupp.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160ab25100af12---96607987052.pdfIn PDF document text
    • http://cascinamana.it/userfiles/file/28575101254.pdfIn PDF document text
    • http://neuragen.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608701b4545e1---26446341816.pdfIn PDF document text
    • http://vilaportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f0e7192b29---95715585910.pdfIn PDF document text
    • https://fiambreszav.com/wp-content/plugins/super-forms/uploads/php/files/17b1ab6ff49e775c0e96596dcb03dddf/sajokovujogikusifor.pdfIn PDF document text
    • http://nsdadventist.org/FCKData/file/12599221956.pdfIn PDF document text
    • https://asiatravel.kg/wp-content/plugins/super-forms/uploads/php/files/8bb53a3a0b367b6522bdfb09f14b8bc3/36053226170.pdfIn PDF document text
    • http://cedresarquitectura.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073d57b87da3---dubajapokovazev.pdfIn PDF document text
    • https://www.baileysmilk.com/wp-content/plugins/super-forms/uploads/php/files/a34f7484eb3bb6c58336c21cf889150c/19566562047.pdfIn PDF document text
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/54d29c930c318e7b2cc4edb949ee96cf/nideliv.pdfIn PDF document text
    • http://cafegreenwichvillage.com/uploads/files/31254548719.pdfIn PDF document text
    • http://vudafrique.com/wp-content/plugins/super-forms/uploads/php/files/9402a712d641378ed8022cf6bd340d7b/mizorokurowaremufumabotim.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=private+practice+god+bless+the+childPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00015276.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15276 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00016a8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16A8D 10896 bytes
SHA-256: 519511d20326238ddf95b4e40906a711d243e2a1474c0dff0f8167db6e6aa12f
font_02_sfnt_off00018373.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18373 17828 bytes
SHA-256: 634140320f452044236d39c5ae6700fb4b2af8eb6c87a3938acde59f21d4427d

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