Malicious PDF — malware analysis report

Static analysis result for SHA-256 abb435a6a9050cf9…

MALICIOUS

PDF

76.5 KB Created: 2021-03-27 17:52:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 24c2e324f1974841dbdfba53b4bf566d SHA-1: b86bd991a3e8e1b323db850231ea0e398ddaff66 SHA-256: abb435a6a9050cf9e7e8fe7450e3d66fd2c952596bec60133702976be7c471dc
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://leonvi.ru/123?utm_term=wwe+smackdown+vs+raw+2019+game PDF link annotation
    • http://lnstagramverifiedsbadgeforms.com/time_management_tips_for_work_life_balance1ywcf.pdfIn PDF document text
    • http://mebelrostov.ru/befogufyubn.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420760/normal_603202d4e1582.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371010/normal_5ff409ab66663.pdfIn PDF document text
    • http://gratoramm.website/washington_state_department_of_health_facility_licensingq1wre.pdfIn PDF document text
    • http://fesupopimos.66ghz.com/nenare.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387925/normal_60536b3fe02fe.pdfIn PDF document text
    • http://topijakalez.22web.org/36824006650.pdfIn PDF document text
    • http://burrrhey.tech/bemutaxuwunimisaboxabokubnzaht.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://4b3b4da4-1145-40fd-8a04-0ac29766dab0.filesusr.com/ugd/6c6203_c55d76e9e263405d971873d40cf66d08.pdf?index=trueIn PDF document text
    • https://d0a6b1b1-1773-4622-8b5e-0ab5990a7ed3.filesusr.com/ugd/b90ba1_37643fd5dcaa40feafb4b478917b68c7.pdf?index=trueIn PDF document text
    • https://780c8f77-0f51-49ab-8dd1-60a90eb210a4.filesusr.com/ugd/1b8612_f7ac2977a237413c889e3e7f37fe6a1f.pdf?index=trueIn PDF document text
    • http://narural.rf.gd/favoledokejewe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b19dfcd-8234-4aad-b878-5eec7399ef9f/3461754650.pdfIn PDF document text
    • https://ab25a8b3-4d80-4d4b-93a1-c1347014fa7c.filesusr.com/ugd/8d0191_0013a001fd264411aa410971f4cf972e.pdf?index=trueIn PDF document text
    • https://11ca5eb4-0abe-4d5d-8073-3f36f6088e80.filesusr.com/ugd/8b62d8_afec9f7e008249cfa47bb1ccfc00ff38.pdf?index=trueIn PDF document text
    • http://rironedonigebi.epizy.com/apostila_aprender_a_desenhar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/015023af-f8fe-48d8-99f4-9b0ca93f038b/movegivonesesunoxutog.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9dfb1545-49a4-42c2-b2e4-51e70e6ccd78/are_breville_toaster_ovens_worth_it.pdfIn PDF document text
    • https://ad9e3d1f-bb22-46ca-892e-b6aa3325a756.filesusr.com/ugd/837d34_6b8ce5195c83493b96aedeffc297320d.pdf?index=trueIn PDF document text
    • https://cf336f9a-6a79-4542-9269-5b62d6eb69dd.filesusr.com/ugd/1daf83_fed62664d79e4fb0a30f4a8b4f33b1f2.pdf?index=trueIn 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_off0000ebdf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBDF 5940 bytes
SHA-256: 02f9ab6d5c610f9a68fa1e8c2e52da2dabff36ad3e415ae48a28beaa88e9129a
font_01_sfnt_off00010021.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10021 10736 bytes
SHA-256: 672c815b0bae3ba5613419139fb3571bf2d5265a4abe18064c2bf1d95f3f78c0

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