Malicious PDF — malware analysis report

Static analysis result for SHA-256 eee68aa58769be35…

MALICIOUS

PDF

68.8 KB Created: 2021-09-20 07:14:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: fb2e36db238a1cca81e3ea4b6e776a23 SHA-1: eae2d86a077af7f1973b6c082770d1345fa24d2b SHA-256: eee68aa58769be356e4c7fb85f9b5e3170c43cb84c51673e5dbc94045c0d6381
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as a malicious PDF by ClamAV and an ML classifier. It contains a link farm pointing to multiple disposable hosting domains, a common tactic for phishing or distributing further malware. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an intent to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://jyotiacademicpress.org/uploads/file/mapatomil.pdf In PDF document text
    • https://maisonforville.be/documents/file/6474802969.pdfIn PDF document text
    • http://proclima-membranes.ru/userfiles/file/21793501376.pdfIn PDF document text
    • http://adveotec.com/img/file/9716033410.pdfIn PDF document text
    • http://auto-spec.ca/fck/file/gademumo.pdfIn PDF document text
    • http://thaide.org/userfiles/file/26977823870.pdfIn PDF document text
    • http://nhatrangpalace.net/app/webroot/upload/files/debunazamono.pdfIn PDF document text
    • http://logicamail.it/draft/media/67112964178.pdfIn PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/4b92b04b1f4875f735aee8e60c76c45f/40928782203.pdfIn PDF document text
    • http://tfforming.ru/d/files/beladenerofosode.pdfIn PDF document text
    • http://kant21.com/userData/board/file/92589998608.pdfIn PDF document text
    • http://elsped.hu/files/file/49470604791.pdfIn PDF document text
    • https://aarushimukhwas.idealviews.com/userfiles/files/rosagojemet.pdfIn PDF document text
    • https://marblobathware.ph/app/webroot/img/files/mowizifiv.pdfIn PDF document text
    • https://phr4u.com/files/molabuw.pdfIn PDF document text
    • http://nadiadsa.org/userfiles/file/69153135002.pdfIn PDF document text
    • https://petroblend.com/wp-content/plugins/formcraft/file-upload/server/content/files/161416d2e0e6d3---90295911518.pdfIn PDF document text
    • http://alarmy-kamery24.pl/userfiles/file/pemezubigiwonobafi.pdfIn PDF document text
    • https://gencshoworganizasyon.com/upload/ckfinder/files/xoxagajokejadaguneku.pdfIn PDF document text
    • http://dalnoboy.net/data/filestorage/upload/files/berosupesujisira.pdfIn PDF document text
    • https://www.sevgiliyevideo.net/wp-content/plugins/formcraft/file-upload/server/content/files/161305f30b4255---60946855175.pdfIn PDF document text
    • http://lisaarkin.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/60564752964.pdfIn PDF document text
    • http://mybed.tw/uploads/files/202109120649501289.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=android+widget+downloadPDF 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_off0000b2ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB2AE 10324 bytes
SHA-256: e681fb875091c9bbb9f53e8c440fcf1844168c7395f7b5634593450fc46187b6
font_01_sfnt_off0000c9eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9EB 14284 bytes
SHA-256: 9db5e5743349f53c06a05057c96d333c712d93bb956179c9fae0feb2982188ee
font_02_sfnt_off0000edb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDB6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1