Malicious PDF — malware analysis report

Static analysis result for SHA-256 fdb2892c86ede6ec…

MALICIOUS

PDF

68.1 KB Created: 2021-09-12 04:00:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 4f148f9fa8564b57b48b8cff959d9a5c SHA-1: c90d9e2f296c5922910353b93673527c0e16bf01 SHA-256: fdb2892c86ede6ec0eb9b9dfc06fe8390cfccb7dfdf31b63d7aa0f5a9f5468fc
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the document is designed to host numerous links on disposable domains, a common tactic for phishing or distributing further malware. While no scripts were explicitly extracted, the presence of embedded URLs and the overall structure suggest an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

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://robalton.es/Albums/images/file///zemodo.pdf In PDF document text
    • http://statsale.com/data/upload/ck/files/19887513374.pdfIn PDF document text
    • https://afmiletisim.com/resimler/files/68497540834.pdfIn PDF document text
    • http://topup-fight.com/ckfinder/userfiles/files/dafinikuxabodadenogamabo.pdfIn PDF document text
    • https://micro-logic.ro/images/uploaded/file/19771421020.pdfIn PDF document text
    • https://leresto-niort.fr/images/userfiles/files/97898759411.pdfIn PDF document text
    • http://www.gesas.it/media/mailinglist/file/33309375238.pdfIn PDF document text
    • http://9meclinic.com/ckfinder/userfiles/files/18200320967.pdfIn PDF document text
    • https://uclerbaklava.com/resources/file/buridegak.pdfIn PDF document text
    • https://zzhqhi.com/d/files/nedapenenum.pdfIn PDF document text
    • https://fruitssupplier.com/app/webroot/img/files/pisivalowo.pdfIn PDF document text
    • https://redac.ch/upload/55905621498.pdfIn PDF document text
    • https://safewatersolutions.in/ckfinder/userfiles/files/70811255519.pdfIn PDF document text
    • http://ecilingirler.com/resimler/files/nizonunadoxowesorevivoxum.pdfIn PDF document text
    • http://primethailand.com/ckfinder/userfiles/files/wawafarivilarar.pdfIn PDF document text
    • http://tid.vn/upload/files/luwimajofusev.pdfIn PDF document text
    • https://promptcorporate.com/ckeditor/ckfinder/userfiles/files/27862668856.pdfIn PDF document text
    • https://cosmopolitanhotelbg.com/uploads/wysiwyg/files/44485493799.pdfIn PDF document text
    • https://hetodon.com/fckeditorfiles/file/30381905617.pdfIn PDF document text
    • http://omegapizza.net/uploads/files/sifumenofa.pdfIn PDF document text
    • https://portsidestrategies.com/wp-content/plugins/super-forms/uploads/php/files/2aa82aa95e48ea76ed5f0b6fab32d439/pozojulam.pdfIn PDF document text
    • http://colegiosantarosa.com/uploads/imagem/file/seduzamawuwevugobuj.pdfIn PDF document text
    • http://asacnfservices.com/ckfinder/userfiles/files/gisoxevamejosepodatitolex.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=tank+io+gamesPDF 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_off0000aee5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAEE5 10264 bytes
SHA-256: 6a200000397608580bb51679041bc84ba0bbb4af0248e361bcd5ae99823fdbcf
font_01_sfnt_off0000c603.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC603 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000de15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE15 14856 bytes
SHA-256: b6cd601dae0c3fe4f5e79acf6ddd05459bae5eb5cd797aefc7226a4d9fe406ce

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