Malicious PDF — malware analysis report

Static analysis result for SHA-256 11b93f80f96067f3…

MALICIOUS

PDF

70.7 KB Created: 2021-04-03 18:19:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: cd038a9b2bc929c4d6b9e8cd1fc2756d SHA-1: 033396ca69b961470b258a11342ea85652487625 SHA-256: 11b93f80f96067f3bce8bb8d4868cb911eaf5e0e735d639175cbbf797db42c1d
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous embedded URLs, many of which point to disposable hosting or link farms, suggesting a phishing or scam attempt. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' and the ML classifier strongly indicate malicious intent. The primary URL, 'https://seumenha.ru/wix?keyword=northville+central+school+honor+roll', is likely used as a lure to direct users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://seumenha.ru/wix?keyword=northville+central+school+honor+roll PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4500887/normal_605327e916db3.pdfIn PDF document text
    • https://guwemegarorara.weebly.com/uploads/1/3/4/3/134353603/kifozufufuwi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409244/normal_6054150b4be6b.pdfIn PDF document text
    • http://thrivewebs.com/are_citronella_collars_bad_for_dogsxbluk.pdfIn PDF document text
    • http://bemixenorekuji.22web.org/gaxozejugenawowafalosono.pdfIn PDF document text
    • https://pananufizusa.weebly.com/uploads/1/3/4/4/134445813/pafogezub_gitavogiw.pdfIn PDF document text
    • https://cdn.sqhk.co/xagaxubibiz/haMaR2N/49616968219.pdfIn PDF document text
    • http://ravajigivipa.22web.org/sara_bareilles_gravity.pdfIn PDF document text
    • http://madusotiju.22web.org/rumubolexujoveg.pdfIn PDF document text
    • https://dulifemubal.weebly.com/uploads/1/3/1/3/131398350/suvilofavo_sowemepafip_gigofu_jevoxibavabat.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4394066/normal_6033d91bd425e.pdfIn PDF document text
    • https://cdn.sqhk.co/tevosenijosu/wijijUT/runescape_castle_wars_bracelet.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://suwojubomitela.epizy.com/fokokafaga.pdfIn PDF document text
    • http://molodetagako.epizy.com/bookkeeping_and_accounting_for_dummies_free.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000da34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA34 4916 bytes
SHA-256: 33bb7c0a443ee9c830a400cb5e677eb65fbcfdc2faf6af0a84780b75940ee2e9
font_01_sfnt_off0000eaed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAED 10600 bytes
SHA-256: e2f78e1aab06c648488716c3273db4420257737a40fcb9a0dfc73bb48d01df9d

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