Malicious PDF — malware analysis report

Static analysis result for SHA-256 0cda50587eec12ed…

MALICIOUS

PDF

84.4 KB Created: 2021-03-16 19:55:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: de86438851f9bbae83888da6b94171c3 SHA-1: e2398835da05314820873b7b4617e4927936c6da SHA-256: 0cda50587eec12ed1a9bad9f401f26ca44e3a839ec761e9a769f427a66188b03
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many hosted on disposable domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of an attempt to lead users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://maypoin.ru/award?keyword=janatics+air+cylinder+catalog+pdf PDF link annotation
    • http://sewaseg.22web.org/descargar_google_chrome_para_android_apkpure.pdfIn PDF document text
    • https://xofudafitigo.weebly.com/uploads/1/3/5/3/135327781/7ced7.pdfIn PDF document text
    • https://vinovebavelugis.weebly.com/uploads/1/3/1/3/131383284/46080ad8a.pdfIn PDF document text
    • https://dagatofolake.weebly.com/uploads/1/3/0/8/130874029/mazugabol.pdfIn PDF document text
    • http://disesomudo.22web.org/xuniwanijinovepo.pdfIn PDF document text
    • http://xujofalidubof.iblogger.org/2005_honda_pilot_electrical_problems.pdfIn PDF document text
    • https://bisudika.weebly.com/uploads/1/3/4/3/134366448/laxamokaf-pabezuxipiw-vuwemad.pdfIn PDF document text
    • https://ponasamexow.weebly.com/uploads/1/3/1/3/131398296/c00e7ab6571fb4.pdfIn PDF document text
    • https://fojiwuduz.weebly.com/uploads/1/3/5/3/135309278/7567258.pdfIn PDF document text
    • https://xotozefubineru.weebly.com/uploads/1/3/4/5/134576546/xenunefipupu-wapubikularoxax.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://natunolujekusi.epizy.com/advanced_dungeons_and_dragons_2nd_edition_books.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/749cb0ff-a4d4-4e5a-8cf4-c897f2c0cc1b/makojatediwevidumas.pdfIn PDF document text
    • http://butexageteril.rf.gd/6522333903.pdfIn PDF document text
    • http://risexogukif.rf.gd/zawasawu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/95952b7b-3d9e-4823-94bc-36775d0fd9b1/fivipeguragazitup.pdfIn PDF document text
    • https://s3.amazonaws.com/kopisigapub/fcic_transaction_archive_report.pdfIn PDF document text
    • https://s3.amazonaws.com/gasodamuza/behind_enemy_lines_movie_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/59210f36-eb4e-4229-b19d-e19e8003a967/todevar.pdfIn PDF document text
    • https://s3.amazonaws.com/bubodeliza/2876365689.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/456f9632-25f6-4947-a1ce-75ce28dee3cc/bugirurezizamubofed.pdfIn PDF document text
    • https://s3.amazonaws.com/miledu/22196678282.pdfIn PDF document text
    • http://mapureju.epizy.com/uae_ministry_of_finance_annual_report.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dbc164b2-bc8d-4caa-9d3f-0489704b78f2/21388338709.pdfIn PDF document text
    • http://bubudisefo.rf.gd/zubepesetanesulopon.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fd78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD78 5204 bytes
SHA-256: 004b1da850d0c97a20587b516093462df25f8085cc3407227c97d7b1d8c54ea2
font_01_sfnt_off00010f2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F2F 10912 bytes
SHA-256: cbda138c48e1285d35f1ffd90dd58e2429815c7f6ff2bc543cf298cb0b64aed9
font_02_sfnt_off00013455.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13455 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34