Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e37de33f9b72451…

MALICIOUS

PDF

83.0 KB Created: 2021-07-15 09:57:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 78dd1614b8d1fa44206827471aacc7d8 SHA-1: 67941951c1e74f3e72b317421ae555b48ac0322d SHA-256: 1e37de33f9b72451f0ff34b8d05fcf7a9e53e7ab69ae2a4651a129e9b60a84c1
96 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded URLs, many of which point to domains associated with compromised CMS uploads or disposable hosting. The ML classifier strongly indicates maliciousness, and the URL structure suggests a link farm designed to redirect users to potentially harmful content. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://irlanc.ru/uplcv?utm_term=kode+the+sims+ps2 PDF link annotation
    • http://argra.rs/wp-content/plugins/formcraft/file-upload/server/content/files/160b7af26bb3aa---gezun.pdfIn PDF document text
    • https://www.chortho.co.uk/wp-content/plugins/super-forms/uploads/php/files/e41t55sc64uejveo17jttbbu7b/xalofituxidu.pdfIn PDF document text
    • http://volkshilfe-vlbg.at/images/content/files/5015869686.pdfIn PDF document text
    • http://notariocprietoa.com/notaria/documentos/files/ralij.pdfIn PDF document text
    • https://best-turbos.com/wp-content/plugins/super-forms/uploads/php/files/c091b6a8b652ce01974b631e33707e4e/fawoximojazimuzu.pdfIn PDF document text
    • https://oiweld.com/wp-content/plugins/super-forms/uploads/php/files/69249da5d169a66ab45df1b093497747/85778656729.pdfIn PDF document text
    • http://olversonfamilyreunion.org/clients/5/51/51a48c89da211807e19ed56f8a1a1822/File/zodudoz.pdfIn PDF document text
    • http://liveisagenix.com/ckfinder/userfiles/files/43017187801.pdfIn PDF document text
    • https://skazkavdom.com/wp-content/plugins/super-forms/uploads/php/files/82effdff54de18d01cf7904d74bb2a1d/55178525105.pdfIn PDF document text
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a02fa0703d2---29784401369.pdfIn PDF document text
    • http://puppiesjust4u.com/clients/c/c8/c8a8d0e690f73854b1e7a5fbb9521f82/File/juvebulesifodijevunadata.pdfIn PDF document text
    • https://drivetripper.com/userfiles2020/files/zamadalimo.pdfIn PDF document text
    • https://area34.info/wp-content/plugins/super-forms/uploads/php/files/kt7dodeilftqc9vu711fncvst6/79384762450.pdfIn PDF document text
    • https://investainternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082ccabdf703---71891917242.pdfIn PDF document text
    • http://www.fsnn.se/wp-content/plugins/formcraft/file-upload/server/content/files/16083deabea1af---tutitatuwuli.pdfIn PDF document text
    • http://dulwichtaxi.com/survey/userfiles/files/vevilov.pdfIn PDF document text
    • https://mobilieroccasion.fr/uploads/file/17519713595.pdfIn PDF document text
    • http://www.bewegeninarnhem.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16087545b5e4c6---zoviladoxeteleximiz.pdfIn PDF document text
    • https://www.lowdoc-loans.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608743e91b415---28121010837.pdfIn PDF document text
    • http://chicagohalo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160acb87c15b5b---82141938798.pdfIn PDF document text
    • https://alshaabcoop.com/userfiles/file/64880516152.pdfIn PDF document text
    • https://www.gs-gleichmann.de/wp-content/plugins/formcraft/file-upload/server/content/files/160722740094fd---gurewitodovepubifipedesot.pdfIn PDF document text
    • http://elisa5888.com/shopadmin/upload/files/62001352659.pdfIn PDF document text
    • https://brusroom.com/wp-content/plugins/super-forms/uploads/php/files/f3fc6aee7ef930577ce1ea364b19968f/91401660086.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_off0000e20c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE20C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fa1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA1E 17380 bytes
SHA-256: 7a7c81197d87c89203f85255c0469c238367aac5346d4f169b60a364398067f4
font_02_sfnt_off000127d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127D0 10356 bytes
SHA-256: 1a47981f49f43e7221e9f7ebaf6756940e117c13f7991252794d300993f27adc

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