Malicious PDF — malware analysis report

Static analysis result for SHA-256 e56507b302eb2c68…

MALICIOUS

PDF

66.5 KB Created: 2021-09-06 19:57:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 78de20318cb5bd4c012fdd1e8a9044e0 SHA-1: d056975f189e1abda982b8754fd5907f94ffea80 SHA-256: e56507b302eb2c683e94ad041a62a612bd2b655f74cc23b40ed53a9b4ede4c30
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected by ClamAV as Pdf.Phishing.Trojan and ML classifiers, indicating malicious intent. It contains numerous embedded URLs pointing to external sites, many of which are hosted on compromised WordPress installations or disposable domains, suggesting a link farm used for phishing or malware distribution. The PDF's structure and embedded content are consistent with a spearphishing attachment designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5231

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
  • 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
  • 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://irlanc.ru/uplcv?utm_term=les+proc%C3%A9d%C3%A9s+explicatifs+1as+pdf PDF link annotation
    • http://ural-kip.ru/admin/ckfinder/userfiles/files/wefezafasoba.pdfIn PDF document text
    • http://alimentosldm.com/userfiles/file/664832623.pdfIn PDF document text
    • https://cspdental.com/wp-content/plugins/super-forms/uploads/php/files/dbd7d23ec0c901956d7ecb5cb1b47d1a/67023246311.pdfIn PDF document text
    • http://harryreichert.de/uploaded_pics/News/file/54401341505.pdfIn PDF document text
    • http://vaness-sens.fr/ckfinder/userfiles/files/4943707993.pdfIn PDF document text
    • http://branonperformance.com/ckfinder/userfiles/files/dolalofu.pdfIn PDF document text
    • https://masukpt1.com/contents/files/tikujodaxawedasebukufo.pdfIn PDF document text
    • http://andrewsexes.org/clients/867461/File/bagojudejagapikimu.pdfIn PDF document text
    • https://postscriptproductions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609fb50b24ef5---25208322656.pdfIn PDF document text
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/0960108daf3e04de2f07a37d3e537db0/49728782770.pdfIn PDF document text
    • http://reklama-v-sochi.com/ckfinder/userfiles/files/11552907906.pdfIn PDF document text
    • https://takarasushimn.com/userfiles/files/17710869366.pdfIn PDF document text
    • http://poetische-malerei.de/web/editor/files/zuzezixabugoxitegejamive.pdfIn PDF document text
    • https://alkhairi.co.uk/wp-content/plugins/super-forms/uploads/php/files/aa16e252848f1c485c6b513dddf75262/20183001612.pdfIn PDF document text
    • https://mavibusiness.it/file/jevofibibiz.pdfIn PDF document text
    • https://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607cb18c7ad2a---63439775293.pdfIn PDF document text
    • https://robotics-institute.com/wp-content/plugins/super-forms/uploads/php/files/leji04hf9boqbfujq8fimlilau/padigofabovezo.pdfIn PDF document text
    • https://lawweb.info/mycms/admin/userfiles/file/78609337391.pdfIn PDF document text
    • http://htwy.com/upload/file/18768286023.pdfIn PDF document text
    • http://stepsforstarlight.org/clients/c/c6/c668404594a1c08d975ab50c7bec58f6/File/mulajawuzoveta.pdfIn PDF document text
    • https://nepalimodelagency.com/userfiles/file/60468125005.pdfIn PDF document text
    • https://przyklejki.pl/userfiles/83976123383.pdfIn PDF document text
    • https://www.advids.co/wp-content/plugins/formcraft/file-upload/server/content/files/161116e2a27765---57917522223.pdfIn PDF document text
    • http://rgn2u.com/userfiles/files/fapif.pdfIn 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b890.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB890 10776 bytes
SHA-256: b8f99bf08c8c56f66412e9d3a6c9e0a101a603ca4d6d47c01f7a8158e2c0d5db
font_01_sfnt_off0000d140.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD140 16712 bytes
SHA-256: ebe7edb079a9c9a63643c0f7d3234503b4007b563a3567bd6729a48845fcce17

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