Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b4277be0d9cf600…

MALICIOUS

PDF

80.8 KB Created: 2021-06-29 09:59:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 116753d40e7e8eb82359851c35374870 SHA-1: 76b9ac050634930a0f0aede6b61beae6554a0455 SHA-256: 5b4277be0d9cf600f2cbc6ceebdc98b7b062485ccaf661210516ea072b921d69
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and ML classifiers, exhibiting characteristics of a payment redirection lure. It contains numerous links to external websites, many hosted on compromised WordPress installations, suggesting an attempt to direct users to malicious sites. The presence of embedded URLs and the overall structure indicate a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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 https://irlanc.ru/uplcv?utm_term=tonight%27s+numbers+for+set+for+life PDF link annotation
    • http://lotuscourtpune.com/wp-content/plugins/super-forms/uploads/php/files/vdgsbj5pes34tq9s9oi5egenm5/78234619014.pdfIn PDF document text
    • https://levin-dent.ru/wp-content/plugins/super-forms/uploads/php/files/1633e0d5e5627448d17cb39c4e5a7645/77574581278.pdfIn PDF document text
    • https://cashmeredreams.com/wp-content/plugins/super-forms/uploads/php/files/9fb275cb380eca33a09acbc920f6e7d7/30755708700.pdfIn PDF document text
    • http://staging.impactredevelopment.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096f2989c886---kizofatilugar.pdfIn PDF document text
    • http://www.niziointerior.pl/upload/file/62688073229.pdfIn PDF document text
    • http://alibabashipping.com/userfiles/file/vefexuxumetewoki.pdfIn PDF document text
    • http://www.holzbau-hoelzl.at/wp-content/plugins/formcraft/file-upload/server/content/files/1607685e9d340c---35040401997.pdfIn PDF document text
    • http://kstarsmall.net/userfiles/file///letugejolejivutu.pdfIn PDF document text
    • https://mandalaconfeccao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a94d559e766---64786671521.pdfIn PDF document text
    • https://viajespereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/160823cfa083ad---6704736324.pdfIn PDF document text
    • https://dsodrecital.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e036421e33---83554561209.pdfIn PDF document text
    • http://happy-travel089.com/CKEdit/upload/files/69043822120.pdfIn PDF document text
    • http://ulrike-mayer.de/userfiles/files/mobikizumap.pdfIn PDF document text
    • http://tavernadelsnoguers.com/wp-content/plugins/super-forms/uploads/php/files/51cfa85de264b03810a4fc9257866c01/56015171463.pdfIn PDF document text
    • http://animalscipublisher.com/files/upfiles/file/xasagigevewekiralanosew.pdfIn PDF document text
    • https://by-express.com/upfiles/editor/files/89316252842.pdfIn PDF document text
    • http://baharemadinah.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077baf6ac918---turinifotanonime.pdfIn PDF document text
    • http://holidayinntorino.com/userfiles/files/wesaniw.pdfIn PDF document text
    • http://slowjamsundays.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f8cd3c7c30---27320388284.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d577028bbb---xubupajoj.pdfIn PDF document text
    • https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a39c90a756a---89715942735.pdfIn PDF document text
    • http://kazenergy.kz/wp-content/plugins/formcraft/file-upload/server/content/files/16088c1e795e1a---38357585203.pdfIn PDF document text
    • https://edbcagliari.it/file/nidasovubexofujo.pdfIn PDF document text
    • https://nikken-engineer.jp/export/sd205/www/jp/r/e/gmoserver/8/6/sd0748886/nikken-engineer.jp/fckeditor/upload/file/3836978874.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d86a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD86A 17112 bytes
SHA-256: 712a948c3de15b4b8f2e25ed22217f7355a675c6406c5ef2432b7cd79dff5677
font_01_sfnt_off00010503.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10503 10736 bytes
SHA-256: ece0747da67bba220b642494a123ff8e15810d237c74eb0cbfc52ddf750c1b9f
font_02_sfnt_off00011d8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D8D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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