Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ed9c732b8847bf9…

MALICIOUS

PDF

133.5 KB Created: 2021-04-04 07:30:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 852c2028121aa760af92f897f7b8477e SHA-1: 77a7d13b97d504aa90f71e1ad403b387647775d1 SHA-256: 2ed9c732b8847bf967e917abfd9db5cd366b108233744fbe6f0453d90f62d452
126 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded URLs, many of which point to disposable domains or link farms, indicating a phishing or spamming attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or distributing unwanted content. No scripts were extracted, but the primary attack vector appears to be the extensive use of deceptive links within the document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

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://dugedepap.ru/award?keyword=ethiopian+amharic+books+free+download+pdf PDF link annotation
    • http://nazulemijoxamif.iblogger.org/anemia_hemolitica_en_perros.pdfIn PDF document text
    • http://mitutazulew.22web.org/audit_report_of_infosys_company.pdfIn PDF document text
    • http://mijudivoxobo.iblogger.org/gekij.pdfIn PDF document text
    • http://maddot.space/xuwovovupoloxemixiditiximi70n9.pdfIn PDF document text
    • http://redit.fun/dave_ramsey_baby_steps_book_for_salei286p.pdfIn PDF document text
    • http://kefoweloruzopos.22web.org/95376845009.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378157/normal_5fe5b1931d184.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447253/normal_5fcdc4a2422e5.pdfIn PDF document text
    • http://garant-ritual.online/51783837454ko8u6.pdfIn PDF document text
    • http://lifeshop.pro/kigikirujofavazadqypyi.pdfIn PDF document text
    • http://metalllift.ru/vojera3v017.pdfIn PDF document text
    • http://kefets.xyz/nuromixurudikumiwodizaj357r.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404528/normal_602f6ee199d48.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://a39ac558-8fe8-437d-9e10-dc9402d6cb9c.filesusr.com/ugd/1ebe14_cd9edc9c4d304a27b4323b8e59ba7d02.pdf?index=trueIn PDF document text
    • https://7f993087-45f6-41f4-96e5-9dcaca18fb91.filesusr.com/ugd/9a92dd_66abf9448b7e4d479538096355974799.pdf?index=trueIn PDF document text
    • http://fonezitugomal.rf.gd/dd_5e_magic_weapons_for_monks.pdfIn PDF document text
    • https://b2fc43c4-60ab-4dc1-a1c8-84833fda4e2a.filesusr.com/ugd/37321e_be2e128da0f04be190f98df1dccabcef.pdf?index=trueIn PDF document text
    • https://507d1b22-ea03-4061-a262-f79425337ca2.filesusr.com/ugd/a374b9_88395fcdaec4485b9e2399c313923653.pdf?index=trueIn PDF document text
    • http://boxulinizisa.epizy.com/nasopateponozewit.pdfIn PDF document text
    • http://supisozireb.rf.gd/the_neverending_story_lyrics_dustin_and_suzie.pdfIn PDF document text
    • http://setudobebo.epizy.com/wordpress_themes_for_novel_writers.pdfIn PDF document text
    • https://b615eccc-4413-4b1d-8109-ede925130a83.filesusr.com/ugd/0994f9_4aa4a595e88b46b5b977065f8712a0a1.pdf?index=trueIn PDF document text
    • http://zijapipote.rf.gd/25236038437.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011d14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D14 69504 bytes
SHA-256: 4c816036d3c60ab87befa9127de13e91c4948626ef6ed8a7bbcc7652cfe36e5f
font_01_sfnt_off0001cc92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1CC92 5648 bytes
SHA-256: 9345ed96bc31432009aa1d7720e5faeecf85b79e73429854f2b130937c8aa0d2
font_02_sfnt_off0001dfab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1DFAB 12152 bytes
SHA-256: 8b2f17b421444b737b00a9c809ca5368da10b3741a43fe0dcdc686cba4366109