Malicious PDF — malware analysis report

Static analysis result for SHA-256 889bd2251cfc5035…

MALICIOUS

PDF

196.1 KB Created: 2021-07-15 17:08:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 32327251ffc01567dd2c125261738782 SHA-1: 8ad20cd4ed2456eb316d653164792bbe64c3e2f9 SHA-256: 889bd2251cfc5035f3fed682258716551b4fcb3163427cf49cf1200716f5ff40
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it contains a link farm pointing to compromised WordPress upload storage and an SEO redirector, likely serving as a lure for a phishing attack. The embedded URLs suggest the document is designed to trick users into downloading further malicious content, potentially a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9895

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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.
  • 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://chcial.ru/uplcv?utm_term=cell+dbz+perfect+form PDF link annotation
    • https://diedacorporation.net/freesiafiles/file/65971972291.pdfIn PDF document text
    • http://stylist.in.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160bfc39639844---6976861636.pdfIn PDF document text
    • https://www.projectorrentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a89b1e91b21---bipudafatexujibogig.pdfIn PDF document text
    • http://www.holzbau-hoelzl.at/wp-content/plugins/formcraft/file-upload/server/content/files/1607ddbc59a742---favuvubazubose.pdfIn PDF document text
    • https://slavica.ru/wp-content/plugins/super-forms/uploads/php/files/a75e6a3818e625371de401e7df000ac3/suzixixewubumugewana.pdfIn PDF document text
    • http://www.predoisiasociatii.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608975e17bc12---kudoxazuz.pdfIn PDF document text
    • https://gbagencement.fr/uploads/file/gerumajebijibekukud.pdfIn PDF document text
    • http://africanhairbraidingsalon.com/userfiles/file/21204379770.pdfIn PDF document text
    • http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081e32283f36---soforumivuli.pdfIn PDF document text
    • http://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084a8023162e---7767793155.pdfIn PDF document text
    • https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083ed1c7207f---57266269757.pdfIn PDF document text
    • https://bistro-8.com/wp-content/plugins/super-forms/uploads/php/files/a5aaaad8680da2887e285b03b7558ba7/29589591472.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096847c5da63---bujodomivotelewusar.pdfIn PDF document text
    • http://chhsclassof70.com/clients/1/1f/1f6d1b94cf555b90b9f410dfa82aea5f/File/joputujukikukol.pdfIn PDF document text
    • http://digjamaica.com/app/webroot/files/jizizaraveme.pdfIn PDF document text
    • http://hzjksj.com/images/upload/File/30096873997.pdfIn PDF document text
    • http://szyuangang.com/UserFiles/file///gibifun.pdfIn PDF document text
    • http://prochem.vn/images/uploads/files/74035732301.pdfIn PDF document text
    • http://nuyewpilot.academy/wp-content/plugins/super-forms/uploads/php/files/03af1de2cc1e88861aad8a8a0949328b/vajexam.pdfIn PDF document text
    • https://podereilmontaleo.it/writable/public/userfiles/file/lafikowij.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

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00028e0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x28E0C 10484 bytes
SHA-256: 848441a4452a4a4349664576545b19a9ebebdee334c9d7bb3670563af3892206
font_01_sfnt_off0002a5ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2A5AD 5176 bytes
SHA-256: f3cc09769f53d44857797fbdca6cad9b0c0e9020197f0c7d7e290a935c5b634f
font_02_sfnt_off0002b8cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2B8CC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off0002d0de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D0DE 19064 bytes
SHA-256: 0e15ecc382b76e984a90199c3370a2590922b90335d38b501a0a362b1d5d1250

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