Malicious PDF — malware analysis report

Static analysis result for SHA-256 200986635b9f54e7…

MALICIOUS

PDF

67.1 KB Created: 2021-09-29 11:23:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 7b106882a5871a975b118ae9f91f0082 SHA-1: 24ed96a9bdcfc794438ac78169743a93a06d83c2 SHA-256: 200986635b9f54e732af50280f8935cc05dcdadc43ad4614b1699a0cf312123f
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. The presence of numerous external URIs, many pointing to PDF files on distinct hosts, suggests a link farm designed to manipulate search engine results or distribute further payloads. The document body was unreadable, but the heuristics strongly indicate a phishing or malicious content distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://kamennykoberec.eu/editor_uploads/system/files/besokabimetini.pdf In PDF document text
    • http://www.mostenpo.jp/userfiles/files/12346957152.pdfIn PDF document text
    • https://gruppopolidori.com/upload/image/file/kapisir.pdfIn PDF document text
    • http://morethancars.nl/uploads/edytor/file/jodasiga.pdfIn PDF document text
    • http://espicycooking.com/files/file///ruturudedupasefonuteduriz.pdfIn PDF document text
    • http://eurolocal.info/sites/default/files/images/file/fomen.pdfIn PDF document text
    • http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614208f995995---15221047868.pdfIn PDF document text
    • http://aurora-c.jp/files/files/69888956783.pdfIn PDF document text
    • http://ideviceplus.nl/app/webroot/files/userfiles/files/wibulijewurinibefor.pdfIn PDF document text
    • https://ka-base.no/images_students/files/27166966275.pdfIn PDF document text
    • https://anjingliar.com/contents/files/xejetovodesexalurukatonid.pdfIn PDF document text
    • http://fructusartis.com/i/File/fifolunoxapufinenimoko.pdfIn PDF document text
    • https://vanphongphamhienluong.com/upload/files/fovideferij.pdfIn PDF document text
    • http://plechotice.sk/tmp/file/93833602919.pdfIn PDF document text
    • https://blv.by/upload/editor/files/kulapit.pdfIn PDF document text
    • https://logcabininn.me/nbloom/fckuploads/file/vukanivivoganopofefel.pdfIn PDF document text
    • http://antonioruizabogados.es/userfiles/file/jabodezavutiw.pdfIn PDF document text
    • http://www.vivelamusica.es/wp-content/plugins/formcraft/file-upload/server/content/files/16140af48c632a---mokabuvigabokamuravof.pdfIn PDF document text
    • https://tomclarkvoiceovers.com/userfiles/files/kuvaxinegexezo.pdfIn PDF document text
    • http://tchid.net/userfiles/file/tarawewifamesaketukivag.pdfIn PDF document text
    • http://koutingchina.com/upload/files/tugogolibozuka.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=top+root+apkPDF 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_off0000abd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xABD2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c3e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3E8 9756 bytes
SHA-256: 1c80287ff568d75414c0c557ebced7625fad155ddb47b66fd964f6aee04cd619
font_02_sfnt_off0000d960.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD960 15272 bytes
SHA-256: 499590048806859d2ff0c8c1c8d85b96531a00cdc9294a661390cc5ebfdad431

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