Malicious PDF — malware analysis report

Static analysis result for SHA-256 af0b159e2eb5b068…

MALICIOUS

PDF

69.4 KB Created: 2021-09-10 23:51:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-01
MD5: d53b471afe1bb72700124ff9a59c3d4d SHA-1: 8ff88134bba022e5da2055ddd91e90aba14a37b4 SHA-256: af0b159e2eb5b0683546fb00aec055568bd3c16b5c2c52546f146299c2519fc1
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 0.9978

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://kokocurry.gm/userfiles/file/14115600052.pdf In PDF document text
    • http://thibangoto.com/app/webroot/uploads/files/kanunozonot.pdfIn PDF document text
    • https://all-stage-meditation.tw/uploads/files/6137970366696.pdfIn PDF document text
    • https://infoenergie-loire.org/userfiles/file/fokanijarajarinesok.pdfIn PDF document text
    • http://xn--o79av69abka850ab6c.com/upload/file/202109080803542866.pdfIn PDF document text
    • https://kvartira-zalog.ru/wp-content/plugins/super-forms/uploads/php/files/24c9313ec8f79dffe773b505b0c0fa7f/tiweponefeku.pdfIn PDF document text
    • http://heydarbaba.org/resimler/files/gifidasodoxila.pdfIn PDF document text
    • https://momentous-inst.com/uploads/image/files/52045448823.pdfIn PDF document text
    • http://poetische-malerei.de/web/editor/files/fijexut.pdfIn PDF document text
    • http://tehnicgaz.eu/files/file/5823757467.pdfIn PDF document text
    • http://retco.ge/ckfinder/userfiles/files/42043162289.pdfIn PDF document text
    • http://villaroyalenews.com/userimages/35693075174.pdfIn PDF document text
    • http://liveisagenix.com/ckfinder/userfiles/files/99433942837.pdfIn PDF document text
    • https://institut-arabe.org/ckfinder/userfiles/files/voxenuwizulutexinib.pdfIn PDF document text
    • http://brcassociati.com/userfiles/files/mosovugulul.pdfIn PDF document text
    • http://lexprikson.com/admin/style/images/userfiles/file/sixijajudibal.pdfIn PDF document text
    • https://art4you.sk/editor_uploads/system/files/69606438330.pdfIn PDF document text
    • https://arnetbilgisayar.com/upload/ckfinder/files/52577149822.pdfIn PDF document text
    • https://hightechrustremovers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1613b9a72d9b39---xelaxup.pdfIn PDF document text
    • http://letdentalab.com/img/files/60896843792.pdfIn PDF document text
    • http://okzawidow.pl/img/upload/files/bavejorigijizaw.pdfIn PDF document text
    • https://gplacestracker.com/userfiles/file/31682151739.pdfIn PDF document text
    • https://linardi.ru/files/file/pekatusikozemeguna.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=change+font+size+on+android+tabletPDF 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_off0000b269.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB269 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ca80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA80 11544 bytes
SHA-256: 7b94c945a6b9d32fbda3b4e2a44324f5529886b2211e136bccb63f4f38c49375
font_02_sfnt_off0000e546.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE546 13876 bytes
SHA-256: e3935200de3d5b2f156ec0b34b809ce8203dfde0b9a855c53b0a7368eefd0043

Open this report in the interactive analyzer, or submit your own file for analysis.