Malicious PDF — malware analysis report

Static analysis result for SHA-256 7627e8c22e15a7fc…

MALICIOUS

PDF

84.0 KB Created: 2021-07-20 11:11:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 651e6020255f9cf58e943255bde6c770 SHA-1: d2339a74947fe8b184342d1e2a6548efffc91558 SHA-256: 7627e8c22e15a7fcecd92208ff494f53962edaf59c835dd04963a4b3842d4b4a
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF was flagged by a machine learning classifier and ClamAV as malicious, indicating a high likelihood of malicious intent. The document contains numerous links pointing to compromised CMS upload directories, suggesting it's part of a link farm designed to distribute malware. The presence of a 'download button' heuristic further supports the phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://www.holzbau-hoelzl.at/wp-content/plugins/formcraft/file-upload/server/content/files/16072c56e807df---2228908199.pdf In PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b51c649fa71.pdfIn PDF document text
    • https://www.enviedecrire.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9a0d7a05a---26469431365.pdfIn PDF document text
    • https://vietnaminsight.biz/ckfinder/userfiles/files/25778124265.pdfIn PDF document text
    • http://elektrostroy.kz/ckfinder/userfiles/files/dilozazowegagigexo.pdfIn PDF document text
    • http://aisef.org/uploads/userfiles/file/file/gisuxeku.pdfIn PDF document text
    • https://www.tai.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160b9cb8f8a97c---bafemopavafiwej.pdfIn PDF document text
    • http://lycee-elm.org/userfiles/file/11814111262.pdfIn PDF document text
    • http://afghansolar.com/userfiles/file/17108679749.pdfIn PDF document text
    • https://xn--1--8kcai1ck2bs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/13fd5083de44dad1befecd3bd74b4ade/92073209347.pdfIn PDF document text
    • http://hi-reid-solutions.com/wp-content/plugins/super-forms/uploads/php/files/1e7295d8467232e451359f4532c36de1/xetonavaxibowubut.pdfIn PDF document text
    • https://www.hed-endo.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1606f65cc148f8---pexodajilonisolizax.pdfIn PDF document text
    • https://lecachet.fr/docs/files/47405768024.pdfIn PDF document text
    • https://www.vedaaz.com/wp-content/plugins/super-forms/uploads/php/files/015dc79084605343647e48d69587d1d5/kafezipevilazub.pdfIn PDF document text
    • https://primewestelectrical.com/wp-content/plugins/super-forms/uploads/php/files/dbe5f130de983b8ce1753006dec68cca/18913356989.pdfIn PDF document text
    • http://bdn10.cz/files/file/kubunobometisexime.pdfIn PDF document text
    • https://canoe.ro/Extras/ckfinder/userfiles/files/90509049599.pdfIn PDF document text
    • https://viboot.com/ckfinder/userfiles/files/92757574435.pdfIn PDF document text
    • https://www.mercedesbenzofaustinservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a99717729b1---51994371377.pdfIn PDF document text
    • https://razvozka24.ru/wp-content/plugins/super-forms/uploads/php/files/059106eff65be2473bb9b6a5876e3ffe/26326267768.pdfIn PDF document text
    • http://ajivikafinance.com/userfiles/file/ropumanem.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=examples+of+anti+competitive+practicesPDF 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_off0000e58c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE58C 17140 bytes
SHA-256: e67bf1d709d37c8040f2ce393ee0c084748ad6ae2272a4bed939c07f87f6f0fd
font_01_sfnt_off000111fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111FA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012a11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A11 10792 bytes
SHA-256: 9cee39c872531537c58362185fd98d7756767fe6422b15c95e1f2b5197d5c9de

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