Malicious PDF — malware analysis report

Static analysis result for SHA-256 210046c1ed49480c…

MALICIOUS

PDF

71.6 KB Created: 2021-06-01 16:02:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 04ddabfbff255938a8c9901b1cc11c88 SHA-1: 8d9fe847bbc601fe760ad5b9519a9935df80f35b SHA-256: 210046c1ed49480cce4c432465956acab7de5004d1f0d814d5f1c7e7959f4393
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan payload. The document body, though heavily obfuscated, contains text related to 'Dedham public library phone number', suggesting a lure to a malicious URL. The presence of numerous external URIs, many hosted on disposable domains, further supports a phishing or link-farming attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://coretry.ru/pbw?utm_term=dedham+public+library+phone+number PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4403129/normal_6064f51579d8c.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4450640/normal_60b521966e105.pdfIn PDF document text
    • https://revevapeseguv.weebly.com/uploads/1/3/5/3/135387876/8936909.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370088/normal_602977bfa0666.pdfIn PDF document text
    • https://zukifetev.weebly.com/uploads/1/3/4/7/134725253/1a48dc204ffa00.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427793/normal_5fe08c880eb1f.pdfIn PDF document text
    • https://muborite.weebly.com/uploads/1/3/4/4/134442605/jadefotakokof-lafivixokabiwo-zewaxibojewuw-pekipixapifamo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369663/normal_5ff15515b4d84.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481275/normal_5fcae7181a92d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412588/normal_6058b56d99b4a.pdfIn PDF document text
    • https://warajepujevofi.weebly.com/uploads/1/3/1/8/131857140/vujizirudubul.pdfIn PDF document text
    • https://mafinejolid.weebly.com/uploads/1/3/2/6/132683008/nogowijupopaguz.pdfIn PDF document text
    • https://xufaparada.weebly.com/uploads/1/3/4/0/134017939/3106caa8e51fb2f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474723/normal_5feee5fad598c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4461746/normal_5fdfd126c9ff7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/69e1efe7-b155-4968-bd26-03c50f587a4b/the_adventures_of_tom_sawyer_book_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/15c7cc08-62da-4674-80ea-037c09d29b51/how_to_descale_krups_coffee_maker.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/89624652-411e-405d-946a-62d894188d2e/26944966992.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1341c6ad-3b3c-4d4e-a3d0-ec619336e69b/lobepixotaxiwumogovi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/12fa1fde-674f-4b09-ab4f-238e38e3ebf0/best_barbarian_build_diablo_3_reddit.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d01b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD01B 5180 bytes
SHA-256: 204caf1c994f01c2031f55bb04c173f46531e8f2b5735015716b75a8cfa86e6d
font_01_sfnt_off0000e181.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE181 9768 bytes
SHA-256: 9492bce85d09af46d72e14191a13b42e9c760cc235d38c41a92704a9a17546ab
font_02_sfnt_off00010303.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10303 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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