Malicious PDF — malware analysis report

Static analysis result for SHA-256 03b142d8258c70b6…

MALICIOUS

PDF

68.8 KB Created: 2021-09-25 03:57:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: bb2e28e32f7190b0373111dd19b1f635 SHA-1: e61f9cbaf4fb7f284d47425b1e664ec3ae8710c0 SHA-256: 03b142d8258c70b6d81b8fbeb10fae46ddc98b393c538d9dc555139860bb7da7
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF is identified as a phishing lure due to its image-only nature and embedded clickable links. It contains numerous links pointing to potentially compromised websites, suggesting an attempt to redirect users to malicious content or phishing pages. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 1 text block(s), carries a click-outward action, and is only 68 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://luxurybaths.marblobaths.ph/app/webroot/img/files/gulomadepemagigiwaxinojow.pdf In PDF document text
    • http://orzo.cz/uploaded/files/44269921500.pdfIn PDF document text
    • https://brawlcall.com/ckfinder/userfiles/files/sokala.pdfIn PDF document text
    • https://mimpishio1bet.net/contents/files/rupas.pdfIn PDF document text
    • http://teplolux72.ru/upload/file/51007972388.pdfIn PDF document text
    • http://coverybox.box8websites.com/ckfinder/userfiles/files/12694574410.pdfIn PDF document text
    • http://theleadershipworks.com/PO2/UPFILE/userfiles/files/42440574387.pdfIn PDF document text
    • http://kirakuramen.com/uploads/files/vunik.pdfIn PDF document text
    • https://www.costaverde.it/wp-content/plugins/formcraft/file-upload/server/content/files/1613558779c6aa---najaw.pdfIn PDF document text
    • https://masterok-kovka.ru/wp-content/plugins/super-forms/uploads/php/files/ca7dcaa15f56cc0bc27ab0c8cd437619/97655517805.pdfIn PDF document text
    • https://vizzzio.ru/wp-content/plugins/super-forms/uploads/php/files/5f49c60c33d04852130ed8f244b962c7/podidedapidele.pdfIn PDF document text
    • http://ghinelliarchitettura.it/userfiles/files/90451308052.pdfIn PDF document text
    • https://ocw.tw/uploads/files/38572122202.pdfIn PDF document text
    • https://anpheatingandac.com/nbloom/fckuploads/file/gavigemimo.pdfIn PDF document text
    • https://drakbera.com/ckeditor/ckfinder/userfiles/files/74850946162.pdfIn PDF document text
    • http://dabien.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/1613530b62537f---zerir.pdfIn PDF document text
    • http://beiwendq.com/data/attachment/file/72464300595.pdfIn PDF document text
    • http://myappartement.de/web/editor/files/32196710955.pdfIn PDF document text
    • https://tonymusic.se/UserFiles/files/43368097658.pdfIn PDF document text
    • https://rijst.nu/userfiles/file/71618908127.pdfIn PDF document text
    • http://szm.hu/userfiles/file/89482041985.pdfIn PDF document text
    • http://zbirozskepodzamci.cz/userfiles/25557576988.pdfIn PDF document text
    • http://xn--m1age8bh.xn--p1ai/files/file/58622758617.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=the+dark+assassin+read+online+freePDF 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_off0000b056.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB056 14340 bytes
SHA-256: fc3616c793e0c6e7299b6b6d145f546650365308e72eb7dedbc2997e03d8caab
font_01_sfnt_off0000d444.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD444 10408 bytes
SHA-256: 26bc13e3438328b5464a3377a07ab9517819325dbe3e4c1fdbf7c71baccf0565
font_02_sfnt_off0000ebbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBBC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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