Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e1ca7699bd74418…

MALICIOUS

PDF

79.7 KB Created: 2021-09-07 10:09:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 6f327d68364b277abb70df21a17da698 SHA-1: 7ec298a3c7abf476a8209b688f21f3cd65e7e11d SHA-256: 2e1ca7699bd74418a076c61ddb5739752232411a89697edb00abcf896d0b8b0c
96 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://holyfamilyhospitals.com/ckfinder/userfiles/files/sopubegawetidofev.pdf In PDF document text
    • https://www.mnogotrop.com/ckfinder/userfiles/files/tazus.pdfIn PDF document text
    • http://tomlitkom.ru/ckfinder/userfiles/files/wuvuxobikubaxevosebomefil.pdfIn PDF document text
    • http://hqshop24.com/userfiles/file/soxukotulenujufofixi.pdfIn PDF document text
    • http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160834459c9dd7---57691597965.pdfIn PDF document text
    • https://novsport.com/content/File/nuxenazipopava.pdfIn PDF document text
    • http://bergfin.se/wp-content/plugins/formcraft/file-upload/server/content/files/1607691a1ee5af---sirokuradamekarepu.pdfIn PDF document text
    • https://playgametoday.ru/wp-content/plugins/super-forms/uploads/php/files/304c6580c65a25777c11b33e26787b91/nodukuvepa.pdfIn PDF document text
    • https://ceccargiurgiu.ro/userfiles/file/93582271066.pdfIn PDF document text
    • http://s2group.pl/userfiles/file/28637462144.pdfIn PDF document text
    • http://sevimticaret.net/userfiles/file/53726924735.pdfIn PDF document text
    • http://standartbio.com/fckfiles/file/bowubi.pdfIn PDF document text
    • http://mesterek.net/tmp/12591984388.pdfIn PDF document text
    • https://www.elektrobetrieb-scholz.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606dbd7360460---51728358292.pdfIn PDF document text
    • http://vimbark.sk/editor_uploads/files/51911551584.pdfIn PDF document text
    • http://www.beautyvogue.ch/Files/file/95650671300.pdfIn PDF document text
    • https://sandzak.best/wp-content/plugins/super-forms/uploads/php/files/65765ed509d98a9d6051aaa429454fb5/63442874104.pdfIn PDF document text
    • http://rford67613.com/clients/a/a2/a20594cba7d6fe247bc87ef9b80620db/File/bovowitawodusuru.pdfIn PDF document text
    • http://club-integra.ru/userfiles/file/41472590927.pdfIn PDF document text
    • http://sghr.ca/upload/ckfinder/files/65769042733.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=diversity+of+life+worksheet+answersPDF 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_off0000d666.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD666 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ee78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE78 16816 bytes
SHA-256: ab8d2ff917697d6f1579ae526d0795058d9423ed67932fc83fc429b7fce37ee0
font_02_sfnt_off0001194d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1194D 10672 bytes
SHA-256: 14eb60933b070e9e058e2710c1835dccc2b9717d35250ce6ffcac337eb03941a

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