Malicious PDF — malware analysis report

Static analysis result for SHA-256 5030e8b258bd8937…

MALICIOUS

PDF

98.6 KB Created: 2021-09-22 23:54:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 873f276a471e3187d26760d15754cde1 SHA-1: 26af0096a8448c1dcfbc5863c6957638b71a5e80 SHA-256: 5030e8b258bd89372163a661bf381955f2152ff6f53dd0991bcc3f05566362b6
156 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to compromised CMS upload directories or disposable hosting, indicating a link farm designed to redirect users to malicious content. ClamAV and ML classifiers flagged this PDF as malicious, specifically as a phishing trojan. The presence of these links suggests an attempt to lure users to external sites, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9785

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://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140a3f9e1f64---gekaworizabirete.pdf In PDF document text
    • https://euro-m.si/web/dokumenti/file/jezixudup.pdfIn PDF document text
    • https://highrise.pl/file/xuredit.pdfIn PDF document text
    • http://aucoindeshalles.fr/menu/file/91618341760.pdfIn PDF document text
    • https://kicksomeglass.com/wp-content/plugins/super-forms/uploads/php/files/4f2ca2ea96a88d2c8b6d968dba2daaff/20435084368.pdfIn PDF document text
    • https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/161354df307a0d---torurobelebej.pdfIn PDF document text
    • https://beaumont-residence.com/wp-content/plugins/super-forms/uploads/php/files/5mij0ln0hkmr538mdurhmvrah3/85194719462.pdfIn PDF document text
    • http://captainkillmite.com/uploads/files/202109050321024988.pdfIn PDF document text
    • https://www.wsbe17hongkong.hk/_bin/ckfinder/userfiles/files/64204893805.pdfIn PDF document text
    • http://irinaburmistrova.ru/files/fudivesume.pdfIn PDF document text
    • http://koala-al.com/d/files/24592679590.pdfIn PDF document text
    • http://www.urbanwaterways.info/files/wulekadunixuvur.pdfIn PDF document text
    • http://methese.com/upload/files/72008907912.pdfIn PDF document text
    • http://www.mab-solutions.fr/upload/file/mogawojunizavugovisomude.pdfIn PDF document text
    • https://hongming-eco.com/userfiles/file/97476688670.pdfIn PDF document text
    • http://goksirkrupskimlyn.pl/img/upload/files/16179608983.pdfIn PDF document text
    • http://inruho.ru/ckfinder/userfiles/files/46282774073.pdfIn PDF document text
    • https://n95america.com/wp-content/plugins/super-forms/uploads/php/files/75b9e55ef882c1c41b63bc8ff7f2a6f1/zefezaxulopogu.pdfIn PDF document text
    • https://butzbacher.turnpoint.jo/app/webroot/upload/files/90788012085.pdfIn PDF document text
    • https://babetravelling.com/ckfinder/userfiles2/files/jebapezoxej.pdfIn PDF document text
    • http://orkoien.com/userfiles/files/7615704306.pdfIn PDF document text
    • https://krusomying.com/data/file/desilewaganitijuk.pdfIn PDF document text
    • https://www.denisonlandscaping.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138f95e82c25---zudikenamojut.pdfIn PDF document text
    • http://transporteslaplata.com/imagenes_web/file/bofenazuforexosubal.pdfIn PDF document text
    • http://vibrobeton.by/pics/files/24676653534.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=spark+art+studio+apkPDF 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e6ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6EF 1808 bytes
SHA-256: c9f4b9eadb0738489149c45493c322c5d0a9f57bb4e460999a713639480ca789
font_01_sfnt_off0000ef65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF65 16212 bytes
SHA-256: 06f75ca824e33c594950714454ca4dc3bf670c28b947b5a2dd9f30d78c5f8ab5
font_02_sfnt_off0001053c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1053C 10368 bytes
SHA-256: b74744e65c52e5e4a3a5881249fbcc76b2a06c8e18d3951ddd5354a5aa569425
font_03_sfnt_off00011cc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CC3 28080 bytes
SHA-256: 918ff9878517dbec322be640fbf368b291ca2f11aeb804f64cdafcf6c1b95dec
font_04_sfnt_off0001642e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1642E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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