Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7a9ee15d38cf756…

MALICIOUS

PDF

80.2 KB Created: 2021-09-10 04:50:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: cef3e3d9887dabd576a21e0fffe1cffb SHA-1: 070d01bb2c8961ca7e41342a289f3719685c1606 SHA-256: f7a9ee15d38cf7561438a81c76a95b58d739b124c856c0cef7800f52b2b9f248
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. It functions as a link farm with numerous external URLs, suggesting it is used to redirect users to phishing sites or download further malware. The presence of external URIs and its classification as a link farm strongly support its role in facilitating malicious redirects.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://drafthe.ru/uplcv?utm_term=puppy+town+merge+%26+win+apk PDF link annotation
    • http://herve-coiffure.ci/files/52143676448.pdfIn PDF document text
    • http://fst-uinsu.net/userfiles/files/41567589362.pdfIn PDF document text
    • https://medsplus.us/admin/images/file/doludupedaviviwijawalope.pdfIn PDF document text
    • https://buzascsaba.hu/userFiles/file/62537645523.pdfIn PDF document text
    • http://www.investinwielkopolska.pl/application/lib/ckfinder/userfiles/files/jajemize.pdfIn PDF document text
    • https://jdbailbonds.com/wp-content/plugins/super-forms/uploads/php/files/8fb551257cb1dec8fc73a56fdac9c59e/71681180695.pdfIn PDF document text
    • http://mellorymotors.ru/admin/ckfinder/userfiles/files/nudatomikuvu.pdfIn PDF document text
    • http://auburn-properties.com/userfiles/files/bajurodu.pdfIn PDF document text
    • https://agrimal.pl/userfiles/file/piluzim.pdfIn PDF document text
    • https://12tiga.com/contents/files/puxetezuwafesarimibi.pdfIn PDF document text
    • https://herfection.herfection.tw/upload/ckfinder_temp/files/20210910054155.pdfIn PDF document text
    • https://maritime-models.com/userfiles/file/24835673347.pdfIn PDF document text
    • https://isleo.com/i_photos/file/19713460487.pdfIn PDF document text
    • https://highlander-inn.com/assets/userfiles/files/datamodakidonigirupipoweb.pdfIn PDF document text
    • http://teusz.pl/UserFiles/file/negibupunod.pdfIn PDF document text
    • https://slavica.ru/wp-content/plugins/super-forms/uploads/php/files/d0ce336f5784e882e904046b08976006/neruw.pdfIn PDF document text
    • https://erdenet.mn/userfiles/file/30020492921.pdfIn PDF document text
    • http://przystaneknida.pl/data/aktualnosci_imgs/file/nituvowat.pdfIn PDF document text
    • http://www.alexgis.com/siteuploads/editorimg/file/26375987829.pdfIn PDF document text
    • https://onderdurdu.com/upload/ckfinder/files/53510722812.pdfIn PDF document text
    • https://stillwaiting.org/userfiles/file/63799095335.pdfIn PDF document text
    • http://abovomedia.hu/_user/file/7930321165.pdfIn PDF document text
    • https://12shio1.com/contents/files/ruxivuxeku.pdfIn PDF document text
    • http://topoint.cc/userfiles/fckFile/20210901102759.pdfIn PDF document text
    • http://www.clc-engineering.com/siteuploads/editorimg/file/sikesafizozapuwip.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_off0000d4d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4D8 10428 bytes
SHA-256: bfcadc5cdd13a3cc6bd1d0c773a68523d538ae9b1062163a6d746a2e51139200
font_01_sfnt_off0000ec8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC8A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001049c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1049C 17644 bytes
SHA-256: c9a5a2298a7376c4db329809a7a60784683f1f4c180a4e11318bf5ef878bbdde

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