Malicious PDF — malware analysis report

Static analysis result for SHA-256 32da1c0332e2e493…

MALICIOUS

PDF

75.4 KB Created: 2021-09-18 21:18:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 35452299c1c0eed237a2cc1dfdae2c8b SHA-1: 21cc2eab8ba2f9e23b574bf863770a4c57afdda1 SHA-256: 32da1c0332e2e49358503a5fac659822b75fd7c3e6ce495cfcf405f60477f295
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URLs, suggesting an attempt to redirect the user to malicious sites or download further payloads. The 'SE_CALLBACK_LURE' heuristic indicates the document may be designed to trick users into calling a fraudulent support number, consistent with phishing or scam tactics. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 7

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://allytemp.ru/uplcv?utm_term=ninja+ultimate+skill+2 PDF link annotation
    • http://serextion2006.com/js/upload/files/65904172974.pdfIn PDF document text
    • https://livredart.com/ckfinder/userfiles/files/61582957802.pdfIn PDF document text
    • http://quesnelbusinessnetwork.ca/userfiles/file/78556963683.pdfIn PDF document text
    • http://www.nisbd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b056fd21c4---nakupud.pdfIn PDF document text
    • https://duproject.com/uploadEditor/files/23393038046.pdfIn PDF document text
    • http://fernandopelosini.it/userfiles/files/90984663196.pdfIn PDF document text
    • http://halmar.info/userfiles/file/talikidilagulukik.pdfIn PDF document text
    • http://tgtech-auto.com/userfiles/file/57828646269.pdfIn PDF document text
    • https://b7b.reviewz.eu/app/webroot/files/userfiles/files/68616841874.pdfIn PDF document text
    • https://berbagiangka.com/contents/files/13955524750.pdfIn PDF document text
    • http://russia-ex.com/images/blog/file/88658277886.pdfIn PDF document text
    • https://tsydesign.com/userfiles/jws/files/rodotuwatunuruwapitiref.pdfIn PDF document text
    • https://francemonde.news/UserFiles/file/nivogakasoma.pdfIn PDF document text
    • https://k85shj16h-561lt.com/contents/files/16135967664.pdfIn PDF document text
    • http://3sdent.com/upload/files/dideluduzadiki.pdfIn PDF document text
    • https://xn--lenachatka-57b.pl/uploaded/file/sopefuxozekupopuwul.pdfIn PDF document text
    • http://bk-plus.at/userfiles/files/gudobipijupuwad.pdfIn PDF document text
    • http://bordahusfeldolgozo.hu/editor_up/dalad.pdfIn PDF document text
    • https://ptkas.com/kingkong/userfiles/files/beturiretal.pdfIn PDF document text
    • http://bluecreator.biz/ckfinder/userfiles/files/60442914637.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c196.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC196 18576 bytes
SHA-256: 529a0dfb085d8f333f2a0ca5499c93714d75b56074836f1ac41c60d38a9bc65a
font_01_sfnt_off0000f0c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0C0 10468 bytes
SHA-256: cc185db6c1d8d582619ddac0f4a70cebd86dda094b0473b52ad16f309e90d14e
font_02_sfnt_off00010882.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10882 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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