Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9792b26af12ac67…

MALICIOUS

PDF

79.5 KB Created: 2021-03-03 18:05:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: d471adf710eeae48143ee029871198d9 SHA-1: 3108c26a606d0b40b2408a96e1c5086500d8e4b8 SHA-256: e9792b26af12ac67102ca884842449061460bb5a1a28dddae7ae4e56226bb900
66 Risk Score

Malware Insights

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

The ML classifier strongly indicated maliciousness, supported by heuristics identifying the PDF as a link farm on disposable hosting. The embedded URLs, such as 'https://resalured.ru/aws?utm_term=disney+peter+pan+and+wendy+casting+call', are likely intended to redirect users to phishing or malware distribution sites. No scripts were extracted, but the structure suggests a phishing or content-luring attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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://resalured.ru/aws?utm_term=disney+peter+pan+and+wendy+casting+call PDF link annotation
    • http://lixidavek.22web.org/96698448006.pdfIn PDF document text
    • https://cdn.sqhk.co/merabuvi/apOjhZc/football_pixel_art_minecraft_download.pdfIn PDF document text
    • https://cdn.sqhk.co/gidulikegel/bZK2Qhg/kesetegejevidupol.pdfIn PDF document text
    • http://motawosofi.iblogger.org/87234237476.pdfIn PDF document text
    • https://cdn.sqhk.co/suzironanes/tgRhbgf/kilekidavovojiju.pdfIn PDF document text
    • https://cdn.sqhk.co/senuziker/ijwghih/best_free_kicks_fifa_21.pdfIn PDF document text
    • http://cafechorsu.ru/surawabusajizevexaxawidi9yvqw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • http://budokukikaririd.rf.gd/expressed_milk_feeding_guidelines.pdfIn PDF document text
    • http://pamakejexo.epizy.com/fejipaguralexe.pdfIn PDF document text
    • http://giratas.epizy.com/zuzifixofojo.pdfIn PDF document text
    • https://s3.amazonaws.com/loneminovu/95392146630.pdfIn PDF document text
    • http://zibinafo.rf.gd/zikimoruf.pdfIn PDF document text
    • http://bipurufepibega.epizy.com/13085056649.pdfIn PDF document text
    • http://suzurexitumafod.epizy.com/28204213254.pdfIn PDF document text
    • http://dudasuz.epizy.com/jogagenaxugenojagogedev.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
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e791.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE791 5436 bytes
SHA-256: 07be46cefe06b2a93fa3c59d8ad53f3b4979e59e456b99e3b9b34c0897970a88
font_01_sfnt_off0000fa2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA2E 6148 bytes
SHA-256: 4910d0177da9f60ecc92c13a34fae8c5c38ffafb9e4e22a3c3fd987548b79157
font_02_sfnt_off00010a0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A0F 11324 bytes
SHA-256: 294b1146c584ae365cbabbc2dc18c10054d87b817cc10157a5ed2e9191d2875c

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