Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2cc5374363b45c8…

MALICIOUS

PDF

72.1 KB Created: 2021-09-24 17:51:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 3e2d9ace47128dec5e839af795c24b19 SHA-1: 1bc50804019de7ec2572969954e095903f45de92 SHA-256: f2cc5374363b45c85a9f610fa3af5d6ffa14317dd825afdcbb6c4715f270c397
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. The presence of a link farm heuristic and numerous embedded URLs, many pointing to PDF files on distinct hosts, suggests a campaign to distribute malicious content or phish for credentials. The document body is heavily obfuscated, preventing a clear understanding of its specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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 http://hacsbathtarntaran.org/~/userfiles/file/11153467280.pdf In PDF document text
    • https://emotionalgift.com/ckfinder/userfiles/files/18964601156.pdfIn PDF document text
    • http://www.findvoters.com/userfiles/file/78054739943.pdfIn PDF document text
    • http://thietbibepnhahang.net/media/files/92627932408.pdfIn PDF document text
    • http://fzsvybbs.at/userfiles/file/87634656351.pdfIn PDF document text
    • https://ibextrail.com/editor-images/vugaripu.pdfIn PDF document text
    • https://sklep-pinokio.pl/web/uploads/files/vitukozed.pdfIn PDF document text
    • http://hurtowniagrafit.pl/userfiles/file/xofin.pdfIn PDF document text
    • http://tea-ra.com/user_data/upload/save_image/files/7899112381.pdfIn PDF document text
    • https://highfieldhousehotel.net/nbloom/fckuploads/file/tupuxorenaxanejelewipaja.pdfIn PDF document text
    • http://prosquash.by/data/botidasadobezoxaxu.pdfIn PDF document text
    • http://foxgraphics.paulsfashion.in/files/repirokaluzuganow.pdfIn PDF document text
    • https://www.tocbirsen.org.tr/ckfinder/userfiles/files/94029161283.pdfIn PDF document text
    • http://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/33163bc98fa78047d61f38b9eb510a10/noboragelada.pdfIn PDF document text
    • http://jncs.kr/page_data/file/20210909173312.pdfIn PDF document text
    • http://goraku-sangyo.com/userfiles/file/74659113633.pdfIn PDF document text
    • http://www.gainerwindows.ca/wp-content/plugins/super-forms/uploads/php/files/k7s4j01hrqk7o9febq5kr68mp4/51762934980.pdfIn PDF document text
    • http://www.dialog-seversk.ru/jsplugins/ckfinder/userfiles/files/30816103045.pdfIn PDF document text
    • https://beta.nhatthiengroup.com/files/uploaded/files/21006634182.pdfIn PDF document text
    • https://aluminiosarla.com/userfiles_arla/files/rejozunebofolomebil.pdfIn PDF document text
    • http://gaushalango.com/uploaded_files/userfiles/files/lizozikulumodiwesin.pdfIn PDF document text
    • http://vistobrasil.net/uploads/file/57640883450.pdfIn PDF document text
    • http://hakasasi.id/userfiles/file/ponefozorudimur.pdfIn PDF document text
    • http://wenyanchem.com/upload/files/jeboferuziz.pdfIn PDF document text
    • http://elsped.hu/files/file/23297490909.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=pokemon+ds+emulatorPDF 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_off0000b642.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB642 17500 bytes
SHA-256: f1e6bc587c4ac9547a357634a18da041c555977a17e25665a2586d63cce04b96
font_01_sfnt_off0000e2cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2CD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fae4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAE4 10508 bytes
SHA-256: d90902b8e3e5ea2f3569ed86e77eabc6e2f2c068c3850996266920fb69f9dbdc