Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab3a8b3f3ac5ce64…

MALICIOUS

PDF

106.7 KB Created: 2021-09-02 12:47:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: d565df7b0427dca7e9f1119471aa9110 SHA-1: 3537c8000bc7d242f5ec41dfa1e2b10fe82038c6 SHA-256: ab3a8b3f3ac5ce64c9bccbc6afa07367451758772a1d3ebb0cdf7b120d07ce56
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The heuristics suggest it functions as a link farm, potentially leading users to compromised WordPress upload storage or other disposable hosting sites. The 'SE_INVOICE_LURE' heuristic further suggests the document's content is designed to trick users into downloading a malicious file by posing as an invoice or payment request.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

Heuristics 7

  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://healingtown.org/userData/board/file/58221384508.pdf In PDF document text
    • https://www.simplythebestevents.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608e9a4cb0b40---78853791221.pdfIn PDF document text
    • http://vintageguitar.ru/ckfinder/userfiles/files/pivowojo.pdfIn PDF document text
    • http://www.cargeacrew.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609435bc3312d---volilujepebeja.pdfIn PDF document text
    • https://www.helpforbusymums.com/wp-content/plugins/super-forms/uploads/php/files/87b938d092dc629bba59305a51262b0e/43245829886.pdfIn PDF document text
    • http://capmar.eu/userfiles/file/garipa.pdfIn PDF document text
    • http://www.tenniscanberra.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16105bd5c61e35---berixojizomegumedo.pdfIn PDF document text
    • https://riverasphotovideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611510dbbc689---7943549650.pdfIn PDF document text
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081158ef19f0---gexufejumo.pdfIn PDF document text
    • https://www.intermediastudios.com.mx/wp-content/plugins/super-forms/uploads/php/files/48b1bea6775570b89b83e704605c2ad4/takinoxuguper.pdfIn PDF document text
    • https://sambelteri.com/contents//files/18950817435.pdfIn PDF document text
    • http://samromschool.com/UserFiles/file/67624552884.pdfIn PDF document text
    • https://www.unicodesystems.com/wp-content/plugins/super-forms/uploads/php/files/9sscjv9659q5uhgs2n9e2pkeb2/zogukoxumejidoza.pdfIn PDF document text
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/41ec44cfed27bf42dccc5fc1a4b2b6d5/duwowivapudid.pdfIn PDF document text
    • http://atiksigorta.com/files/48547286329.pdfIn PDF document text
    • http://splogservice.ru/content/file/8880929373.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/7fe3e4cb0401b14b26df062bb0369e10/82527096820.pdfIn PDF document text
    • http://d-a-s.cn/userfiles/file/16921090378.pdfIn PDF document text
    • https://gelblighting.com/userfiles/files/dawezadafumumekipekufati.pdfIn PDF document text
    • http://sarahscupcakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cdde6e8ea9---27471093991.pdfIn PDF document text
    • https://soalmatematik.com/userfiles/file/44700955653.pdfIn PDF document text
    • http://absolutelyneon.com/userfiles/file/80059532276.pdfIn PDF document text
    • http://nawooelcs.com/upload/userfiles/2021/07/files/210720061535.pdfIn PDF document text
    • http://abapaposentados.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608539a4842b3---jebimigopulelutibipe.pdfIn PDF document text
    • http://winteringlawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/70606763184.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=lean+six+sigma+curso+pdfPDF 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_off00013792.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13792 10980 bytes
SHA-256: 3b65f65948c6c3c651877c33a805b88cabf8fc8f11324fb55ef2436f48f7c30d
font_01_sfnt_off000150d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x150D8 19996 bytes
SHA-256: 6544d49dfc60daf64b47772e13a0795dfeaaa87cabf102261a5b0a85ddd74315
font_02_sfnt_off00018386.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18386 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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