Malicious PDF — malware analysis report

Static analysis result for SHA-256 36d4d0fc13474eb2…

MALICIOUS

PDF

88.9 KB Created: 2021-07-31 00:16:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 9f07a8d48d3a8bb7e2a109e7d6f1fcc3 SHA-1: 60c4db207b43e12c6c45bbd6c55c53ec4ddc93c6 SHA-256: 36d4d0fc13474eb28bd529828bbad7c2664673db0dc9a1ba49cac7915b36ca29
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a high-severity PDF_RANDOM_URL_LINK and ClamAV detection. The presence of numerous external URIs, many pointing to compromised CMS uploads and disposable hosting, suggests a link farm designed to redirect users to malicious content. The SE_INVOICE_LURE heuristic indicates the document's content is likely a deceptive lure, aiming to trick users into downloading a payload disguised as an invoice or payment document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

Heuristics 8

  • 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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://garglob.ru/uplcv?utm_term=hoy+he+vuelto+madre+a+recordar+acordes+guitarra PDF link annotation
    • https://motoquadro.de/userfiles/file/24411079418.pdfIn PDF document text
    • http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16090bbcf9d166---65934193471.pdfIn PDF document text
    • https://hoakhanh.vn/uploads/image/files/rakajulenegubufoz.pdfIn PDF document text
    • http://ambulatorioveterinariopisillibertozzi.eu/userfiles/files/95226966994.pdfIn PDF document text
    • http://amwordpress.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607d3d634a02c---21766096137.pdfIn PDF document text
    • https://legouic-peinture.fr/userfiles/file/48693440805.pdfIn PDF document text
    • http://www.suffaheducation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9bd10d3375---bepiniwajofotu.pdfIn PDF document text
    • https://bykevin.com/wp-content/plugins/super-forms/uploads/php/files/fb4b12be0ed520258db67c2f94e9cb0d/70134826307.pdfIn PDF document text
    • https://kvartira-zalog.ru/wp-content/plugins/super-forms/uploads/php/files/5d73a5e55f2bacc1767fb231f581075e/josaweposowasupekufogif.pdfIn PDF document text
    • http://problemconsulting.com/img/download/files/logebelon.pdfIn PDF document text
    • https://www.democratum.com/wp-content/plugins/super-forms/uploads/php/files/8663add41c9ce628169b3115a4c3da38/nekelobenet.pdfIn PDF document text
    • http://kielcenoca.pl/files/file/78105148143.pdfIn PDF document text
    • https://yidinfo.net/wp-content/plugins/super-forms/uploads/php/files/8g21m61hjaiee9mpui7lfufgsa/58724549641.pdfIn PDF document text
    • http://centronegozi.com/public/29995493330.pdfIn PDF document text
    • http://cricalliance.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608972b55527d---27076398612.pdfIn PDF document text
    • https://www.higher-energy-trampolineclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076bbf69b40e---74624824026.pdfIn PDF document text
    • http://rld-carbon.ru/file/196620965.pdfIn PDF document text
    • https://www.jnvhardoi.org/ckfinder/userfiles/files/vojumajatesu.pdfIn PDF document text
    • https://dongytueduc.com/wp-content/plugins/super-forms/uploads/php/files/eiqshb9h77af2qejnal09l9srl/kelabojerulad.pdfIn PDF document text
    • http://arcomproltd.com/userfiles/file/43141853501.pdfIn PDF document text
    • http://subventionsbetrug.de/wp-content/plugins/super-forms/uploads/php/files/g8cfi5nllun4c2kjkh8njsie8p/16448107082.pdfIn PDF document text
    • http://lichnyiybrand.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1608653c8242c9---lepuvoxilonevoj.pdfIn PDF document text
    • https://www.properties-thassos.com/wp-content/plugins/super-forms/uploads/php/files/0gau1bd2618e1e186e172lo76i/rozev.pdfIn PDF document text
    • https://asharfilalkulfi.com/ckfinder/userfiles/files/ziguwanuvan.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_off0000f0c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0C1 19016 bytes
SHA-256: f9d046e03b9d8a79be5ff44579f3c0cbb2544dffa329cb11138dced8c5733eb7
font_01_sfnt_off000121ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121AB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000139c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x139C2 10984 bytes
SHA-256: a44e7a2da6a25aaa55adca0e5339080bb9268d91d7e6d504209c39494ae0e2c6

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