Malicious PDF — malware analysis report

Static analysis result for SHA-256 4cb82a634dd6e710…

MALICIOUS

PDF

99.7 KB Created: 2021-09-06 01:03:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 00502231f0555111e5fc0103ea12f001 SHA-1: 02d009a90f2635a63dd0aaa8728fa6fdb67ddefc SHA-256: 4cb82a634dd6e7100069e91842cfcac34c09930c7f92d01f6a7744e3fddeada9
156 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a link farm with numerous URLs, many pointing to compromised CMS upload directories, suggesting an attempt to distribute malicious content or phish users. The presence of external URIs and link farms indicates a likely spearphishing attachment vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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://audiomaster.se/wp-content/plugins/formcraft/file-upload/server/content/files/1611cf46544fd7---83301033888.pdf In PDF document text
    • https://cambodiaangkorhomestay.com/userfiles/file/wokedidukowibagopaf.pdfIn PDF document text
    • https://jhservice.net/imagenes/galeria/files/92661769613.pdfIn PDF document text
    • https://flycam.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1608ae676c8c9b---wilopetotu.pdfIn PDF document text
    • https://luminex.pl/upload/file/lodarorilubovajilifip.pdfIn PDF document text
    • https://magnanelli.com/userfiles/file/7813558770.pdfIn PDF document text
    • http://kuppersbusch.hu/userfiles/files/kuxowulimeg.pdfIn PDF document text
    • http://artecgroupservices.com/imagenes/file/62960828199.pdfIn PDF document text
    • https://www.pietri-automobiles.com/wp-content/plugins/super-forms/uploads/php/files/ako6kqkocucbiil9c8a3evpodd/vuviragujazape.pdfIn PDF document text
    • http://thueotodn.com/uploads/image/files/5947733979.pdfIn PDF document text
    • https://www.emma-solutions.de/wp-content/plugins/formcraft/file-upload/server/content/files/160929749e9db9---samelidasopogubilen.pdfIn PDF document text
    • http://serendipityorlando.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1b8a0a1c48---nirejajomodezuzaxo.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/16090cd5a49275---kaluxivoxifiliwo.pdfIn PDF document text
    • http://www.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094318aa754a---jikejasobipesudagu.pdfIn PDF document text
    • https://baileyelectrical.services/wp-content/plugins/super-forms/uploads/php/files/0glio79mtm1a0vlci9nq3dq36l/lomatikuwotozof.pdfIn PDF document text
    • https://planningpvedh.nl/ckfinder/userfiles/files/zameto.pdfIn PDF document text
    • https://yourtuscanyguide.com/wp-content/plugins/super-forms/uploads/php/files/k6tgo64o8p540cfa3mh2scuj03/nolejetarodagawedasuv.pdfIn PDF document text
    • http://clinicaveterinariailmarzocco.it/userfiles/files/71266626057.pdfIn PDF document text
    • https://tvsporedi.si/vsebina/fodisutukevamaxafox.pdfIn PDF document text
    • https://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608493c85c345---74878914101.pdfIn PDF document text
    • http://www.xpresswedding.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d704b7a8044---36500948773.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=positivismo+en+mexico+pdfPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011fe6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FE6 19664 bytes
SHA-256: 50c7c9771163cdad3cddbffe4e693e2aa5a467344da0c5dfa0bf829ef68a5933
font_01_sfnt_off00015146.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15146 10644 bytes
SHA-256: 6de61a367825b1669782c4383fa988cc69e97a1915b0b944595aaedf5479cc74
font_02_sfnt_off000169b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x169B2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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