Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5222409d7a4bfa8…

MALICIOUS

PDF

69.8 KB Created: 2021-03-22 19:09:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: dd514a1cb3a82e2d9e30182a886b8b8b SHA-1: e99eb8a4d264afc358f29ec57459d427bfdbcbac SHA-256: e5222409d7a4bfa81a9703b622b657ca77f80c8c3a2eb406b3e6b4da1bb04030
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://golowaki.ru/aws?utm_term=fantastic+beasts+screenplay+ebook+free+download PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4461234/normal_6054fe41ce807.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404757/normal_5ff76aaf91e70.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452839/normal_5fdbc0bb6ded2.pdfIn PDF document text
    • http://manibupefif.mypressonline.com/50_essays_that_worked.pdfIn PDF document text
    • http://mofirixubutibi.getenjoyment.net/alpha_beta_and_gamma_diversity.pdfIn PDF document text
    • http://womizepivilora.sportsontheweb.net/2548355248.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451970/normal_6015a5302bedb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447098/normal_5fdc3cca502c8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://625f08e2-3d8e-45b5-8e8c-b95d001c5c7c.filesusr.com/ugd/d94ae5_58f71e77422e49b9886c1705c4c51852.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/00690cf2-a324-46cd-a5b5-bc32f8747f63/74130900404.pdfIn PDF document text
    • https://s3.amazonaws.com/womirofop/twitter_er_firefox_extension.pdfIn PDF document text
    • https://da6a6a96-7907-4aac-bfe3-592928b14ca9.filesusr.com/ugd/39e844_8b77f9b51d0740a9a412bed7787277c5.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/suximawo/dark_knight_returns_comic_quotes.pdfIn PDF document text
    • https://0f0532cb-4478-41f9-91a1-cf277c4732ec.filesusr.com/ugd/8acad3_b5079a8a68f54960a74ae13c3d3b424d.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee0d7bad-896a-45b4-a7cd-2e0646cdefcf/30629965461.pdfIn PDF document text
    • https://s3.amazonaws.com/bibejovixapis/2795075466.pdfIn PDF document text
    • https://76df98a8-3e94-4eee-a6f5-23e1de06049b.filesusr.com/ugd/54c74c_f4cffcdc64fb481c99e89d82cc5b9ace.pdf?index=trueIn PDF document text
    • https://d4f4546a-a836-4b3d-8651-c56b89608eca.filesusr.com/ugd/3e9e83_2f0ec2966d854250975f14b8ab116b71.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/637a21e6-f0bd-4c65-8038-450cdf2e6760/ver_el_mundo_magico_de_terabithia_espaol_latino_hd.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8708e084-ceb3-4ed2-91b6-b68790d99fc0/similar_triangles_worksheet_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ddc15032-7690-46e3-a625-08be34747084/75540849112.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d18c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD18C 5504 bytes
SHA-256: b102291f110795029e98867024a2354cd59bfaddf8f3008d69f35bc904bcb5f7
font_01_sfnt_off0000e468.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE468 10380 bytes
SHA-256: ade48952f4c5178d1f8b7d8fb460ff179a6928ac831864559223fb860dc3e23f

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