Malicious PDF — malware analysis report

Static analysis result for SHA-256 058a62ffa678afd1…

MALICIOUS

PDF

74.7 KB Created: 2021-03-21 03:11:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 2d784f5690a57afe9a8145ba484bd1d7 SHA-1: 536734ee232a37f8d97203a889bc698d00b9c9a3 SHA-256: 058a62ffa678afd102cb2f0022583e6d95e4206f5db4dd1d8817e1cc3da22e43
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 0.9998

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://midufefew.ru/wix?keyword=byu+health+final+study+guide PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4418188/normal_5ff34fa0d902b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448540/normal_603becc613de7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408990/normal_60019af9e73aa.pdfIn PDF document text
    • http://gezoxapawelu.22web.org/psychology_books_by_nagarajan_in_tamil.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409098/normal_600e570ba9dc5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://8459f3b7-b2e6-4b58-af31-5f29adf293b7.filesusr.com/ugd/a68450_a76593859b37444f8932e8f882335355.pdf?index=trueIn PDF document text
    • https://ce322291-b3da-4cc2-ae0f-523e25daec44.filesusr.com/ugd/4530da_796ebbb723174a1285afbe55b329cef6.pdf?index=trueIn PDF document text
    • https://b304dada-1952-41b2-af44-d16a3232bb3f.filesusr.com/ugd/c19c34_01a710522cfb4297b229195ddc50130e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/cba21e4c-9170-4915-8169-688689914d38/pasos_para_preparar_un_bosquejo.pdfIn PDF document text
    • https://s3.amazonaws.com/zosevid/calculator_windows_xp_free.pdfIn PDF document text
    • https://87da31d5-d184-45e7-a456-0ad082c8bd65.filesusr.com/ugd/55e94a_6258b667e2d34aaa877561db95b38bae.pdf?index=trueIn PDF document text
    • https://3315be42-5dab-4b6e-b44d-105cb490973e.filesusr.com/ugd/2e3488_4d4a852a7341425e9c8e5c24c239694c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fekife/4013089011.pdfIn PDF document text
    • https://23da7c74-6e14-424a-b22a-901aa35eafb1.filesusr.com/ugd/9cc572_cab4aca0018e4628bcb80f29a865472e.pdf?index=trueIn PDF document text
    • https://7ae52be2-ba3c-41fb-8935-29281088223e.filesusr.com/ugd/affaa6_b8672ffb0f274518978f175d4f7aff29.pdf?index=trueIn PDF document text
    • https://8f20b4bd-83f7-4a55-8c6f-e9501e2e061c.filesusr.com/ugd/c1c462_5e0ec4bf91954fe78991a9b4b84b2452.pdf?index=trueIn PDF document text
    • https://ee42ee57-4547-4a8c-8a66-6cccb7f6869d.filesusr.com/ugd/2a9ad2_08e795f00b924cb791d0577d29fdeef7.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/20f19814-4f3c-488d-90ab-e3b8a9d6e3fd/98676584403.pdfIn PDF document text
    • http://moletilezozosi.epizy.com/mezawenodutapefo.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e67a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE67A 5224 bytes
SHA-256: f63bf2861f6251b1e65b6afdeee45a1f91c3ce9476e27c188f688c1aa0c57115
font_01_sfnt_off0000f855.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF855 10932 bytes
SHA-256: 12a4ad8c1886a3616dc2ad66e845b9d88d76f68e2833e4dd4a3458c0f8c856e2

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