Malicious PDF — malware analysis report

Static analysis result for SHA-256 3787662ad144ef25…

MALICIOUS

PDF

73.3 KB Created: 2021-06-09 04:16:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: c9038e51dd62f4e8a4a7716a2f91572b SHA-1: 44e4cc70c8fa86226e4ad5bd1900c2e767d28c67 SHA-256: 3787662ad144ef25e0ec9bbc9c8bdbf4eaeef6ff871c887afa6d76827b55e32a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link farm designed to direct users to download files, masquerading as a free 'Panda helper vip free ios 12'. Multiple heuristics indicate this is a link farm on compromised or disposable hosting, and ClamAV identifies it as a phishing trojan. The embedded URLs are the primary indicators of malicious intent, likely leading to further malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 https://inwebjor.ru/uplcv?utm_term=panda+helper+vip+free+ios+12 PDF link annotation
    • https://hinodanang.com/uploads/image/files/xobopusirokakuvil.pdfIn PDF document text
    • http://xn--49s538bo8ux8c.net/userfiles/file/74339070285.pdfIn PDF document text
    • https://tehnol.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a2d73065630---21768538684.pdfIn PDF document text
    • https://cgeminfos.ma/upload/file/25654246735.pdfIn PDF document text
    • http://www.elitagida.com.tr/wp-content/plugins/super-forms/uploads/php/files/q3r647qs9tsevbjhujnb35lut7/namase.pdfIn PDF document text
    • http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16078d0ba208ea---14738757630.pdfIn PDF document text
    • https://zionapostolicministries.org/uploads/file/jemebasumepejelexopi.pdfIn PDF document text
    • https://avenirpourtous.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16079354c53c24---80122971090.pdfIn PDF document text
    • https://jollytime.ru/wp-content/plugins/super-forms/uploads/php/files/5936d9b34f84286d2e5d27f6aec40a9e/76138455103.pdfIn PDF document text
    • https://euroroma-bg.org/files/file/25153745939.pdfIn PDF document text
    • https://engravestone.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087167927832---482628484.pdfIn PDF document text
    • http://pspectr.ru/userfiles/file/juxasimamepo.pdfIn PDF document text
    • http://www.thebetterinsurance.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093c8628045c---76776781954.pdfIn PDF document text
    • http://veronicanealhome.com/wp-content/plugins/formcraft/file-upload/server/content/files/2/1607ebb8317b5d---45444649671.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dfc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFC6 5372 bytes
SHA-256: d2d764c8eaefa4f640d991b70fae877bf4042a6c5b7394fb89343a71e993018e
font_01_sfnt_off0000f219.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF219 10816 bytes
SHA-256: cb6a92c51908e46620c5dbf286805efc0416a022337c3e7e795102a68b684f7e

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