Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e2a5c399e7bed6e…

MALICIOUS

PDF

82.4 KB Created: 2021-09-14 16:04:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: fc843466644bc00ad164dc7c2e7ecfce SHA-1: 80dde9b890312d500c3ee1601f1114a61f8bb11e SHA-256: 0e2a5c399e7bed6ec8ba43087c1600c03a28233ab1c93d0136223ebdc6fe6dcf
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. Heuristics reveal it functions as a link farm, directing users to multiple compromised WordPress upload storage locations and other disposable hosting sites. The embedded URLs suggest a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://zaun-produzent.de/userfiles/file/tobonexofukonopob.pdf In PDF document text
    • https://latrinquette.com/upload/editor/file/51887085042.pdfIn PDF document text
    • https://pakianco.ir/data/image/uploads/news/files/rotewimoguvemuraxewubese.pdfIn PDF document text
    • https://mehreganimaging.com/images/upload/files/neladegogukuforofiwedip.pdfIn PDF document text
    • http://carlaschroyen.com/content_docs/nenemagudusawesu.pdfIn PDF document text
    • https://kvzriu.org/images/file/9591946718.pdfIn PDF document text
    • http://www.vivelamusica.es/wp-content/plugins/formcraft/file-upload/server/content/files/1613532efab904---17466447959.pdfIn PDF document text
    • http://meubelenindex.nl/images/uploads/wumodunawafatanu.pdfIn PDF document text
    • https://dreptultau.hotnews.md/upload/userfiles/files/17423277380.pdfIn PDF document text
    • https://lotusmarinevn.com/upload/files/28310017073.pdfIn PDF document text
    • https://barcelonacentromedico.es/files/galeria/files/25350857735.pdfIn PDF document text
    • http://zamdq.com/filespath/files/20210913153844.pdfIn PDF document text
    • https://lanna-flyingclub.com/ckfinder/userfiles/files/ledalekotuno.pdfIn PDF document text
    • https://www.cir.cloud/wp-content/plugins/formcraft/file-upload/server/content/files/161379c13ebe41---jegetagutelukimalanox.pdfIn PDF document text
    • http://1night2day.com/ckupload/files/nosabagilamure.pdfIn PDF document text
    • https://duext.com/wp-content/plugins/super-forms/uploads/php/files/7ccb5c126fbd61cbaab29acc00a03c73/51681002133.pdfIn PDF document text
    • https://gullyracing.it/admin/ckfinder/userfiles/files/96440750082.pdfIn PDF document text
    • http://chanakyaaerospacedefence.com/userfiles/file/patudededepubena.pdfIn PDF document text
    • http://xn--2e0b30g3uq7pay7m.com/upload/fckeditor/file/pivof.pdfIn PDF document text
    • http://weldingplaza.com/files/file/7574008522.pdfIn PDF document text
    • https://sakitonus.ru/wp-content/plugins/super-forms/uploads/php/files/23771ff675c62144ea6daea13215b438/73173711404.pdfIn PDF document text
    • http://hoitruyengiaocodocvietnam.com/uploads/image/files/kesunabujuxetodagilepu.pdfIn PDF document text
    • http://iglozawiercie.pl/zdjecia/file/91192978680.pdfIn PDF document text
    • http://comitatoamiantovelodromo.org/userfiles/file/98231726011.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=como+hacer+un+backup+completo+androidPDF 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_off0000d8c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8C4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f0d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0D6 19540 bytes
SHA-256: 9347ba1f3d1b17c6351a4fa54caacac57db40d5da74c66e22f738239cc805f17
font_02_sfnt_off0001222e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1222E 10972 bytes
SHA-256: 30a6f78341af507839949c9ea596eb568ce9426e6add9784ec2d88f432688d1f

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