Malicious PDF — malware analysis report

Static analysis result for SHA-256 365237b0f998ac92…

MALICIOUS

PDF

89.6 KB Created: 2021-09-08 17:07:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-23
MD5: e133ee1c234f1ad2c98ca221c8467535 SHA-1: e4ec2482da614a9e60a7a1865d78b5d02b56731f SHA-256: 365237b0f998ac924b03de747155418093e1b5b8151b394087e5a697acd0d386
126 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://philabc.ru/uplcv?utm_term=dollar+tree+application+pdf+2019 PDF link annotation
    • http://dbcasagayathottam.org/assets/uploads/cms_images/files/falefebotexuj.pdfIn PDF document text
    • https://southernwashpros.com/nbloom/fckuploads/file/80246118400.pdfIn PDF document text
    • https://handinhand-daycare.com/ckfinder/userfiles/files/rerirakumuzesoniwadudi.pdfIn PDF document text
    • http://achilleferolla.it/userfiles/files/26019674036.pdfIn PDF document text
    • https://mayphotocopydogia.com/upload/files/65974162283.pdfIn PDF document text
    • https://moniimpex.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136f75906e2a---32620597169.pdfIn PDF document text
    • http://belovosushi.ru/files/giwipewide.pdfIn PDF document text
    • https://zoldlaptop.hu/ckfinder/userfiles/files/negapoxupilogutasukati.pdfIn PDF document text
    • http://crocepadrekolbe.it/userfiles/files/30113331920.pdfIn PDF document text
    • http://mnogonomerov.ru/uploads/file/9851160352.pdfIn PDF document text
    • https://equalitas.es/userfiles/file/napirulig.pdfIn PDF document text
    • http://hondaototanan.com/upload/files/towivodu.pdfIn PDF document text
    • https://shastriratanchatterjee.com/ckfinder/userfiles/files/kanufe.pdfIn PDF document text
    • http://digitalpolicycouncil.org/imagenes/file/82365647068.pdfIn PDF document text
    • https://tootooair.com/FileData/ckfinder/files/20210907_CC4BEEC0D3D9F50E.pdfIn PDF document text
    • https://quangcaowebsite.xemlaco.com/uploads/files/54985579851.pdfIn PDF document text
    • http://mosjob.ru/images/file/7141989178.pdfIn PDF document text
    • http://aibasavar.edu.bd/app/webroot/ckfinder/userfiles/files/sakuxepafoj.pdfIn PDF document text
    • https://www.bluegreenshouseboats.in/wp-content/plugins/formcraft/file-upload/server/content/files/1612fdbee0858d---56297373945.pdfIn PDF document text
    • http://dobre-jaja.com/Upload/file/vefazedaletomew.pdfIn PDF document text
    • http://kxnjl.com/userfiles/files/tozofugotagujilog.pdfIn PDF document text
    • https://copyjokertw.aw6.tw/uploadfile/qu4_qu106_com/files/lowufetugukulujejuka.pdfIn PDF document text
    • https://newtech-utm.pl/userfiles/file/muvaw.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f57e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF57E 10908 bytes
SHA-256: 2d98b386a61af1e662f8e8535e3dc43c8b372c2c137570b4c23806def735a6a8
font_01_sfnt_off00010edf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EDF 19072 bytes
SHA-256: 0d3aa182f917e9617fb7184bd12d2cb9cd2ffc85104da8bd92f87ad13026fb5c
font_02_sfnt_off000140d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x140D7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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