Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9eff3c7eef419ca…

MALICIOUS

PDF

74.3 KB Created: 2021-06-12 14:18:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 52725dc3c706f6322112cbeba4b74a9e SHA-1: 53502af7a87ace63238acbd225603837075205e4 SHA-256: e9eff3c7eef419caf174d4ff18aa9526aeb17f80fd1d802da9156502c49de9c4
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 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://crysiq.ru/pbw?utm_term=19+kg+is+how+many+pounds PDF link annotation
    • https://rotonozi.weebly.com/uploads/1/3/5/3/135315410/dusabivigig.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487894/normal_5ffab8a50f62d.pdfIn PDF document text
    • https://sadusanolomu.weebly.com/uploads/1/3/4/6/134646393/32fd5af.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393362/normal_602c750f1022d.pdfIn PDF document text
    • https://wavimukuwu.weebly.com/uploads/1/3/0/8/130874629/gotowofuviposut-kitujurugob.pdfIn PDF document text
    • https://tudimase.weebly.com/uploads/1/3/5/9/135985307/76bd985a6b32f9.pdfIn PDF document text
    • https://doretufokisa.weebly.com/uploads/1/3/1/4/131438244/9573217.pdfIn PDF document text
    • https://fazolusafiwef.weebly.com/uploads/1/3/4/5/134585025/lamik_pazikufoferudop.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411511/normal_6041c9c0b4c72.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425211/normal_60648cedd2462.pdfIn PDF document text
    • https://midumusifefo.weebly.com/uploads/1/3/5/4/135401272/0a99e949c64a43e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e0dfd90-9814-4d26-864b-21a0ee7bffdc/20144342862.pdfIn PDF document text
    • http://sezipakupuw.pbworks.com/w/file/fetch/144794232/what_is_finite_and_non_finite_verbs.pdfIn PDF document text
    • http://sekodegaxex.pbworks.com/w/file/fetch/144907659/making_slime_without_baking_soda.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d747bad3-5ed9-4528-a40e-692123109760/49010346734.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/19eb61d6-bb2a-418c-8955-4841c2cb295e/wolpert_l._principles_of_development_5th_edition_download.pdfIn PDF document text
    • http://funuvutidip.pbworks.com/w/file/fetch/144468189/mowoxobefetovevitobomuxaf.pdfIn PDF document text
    • http://lekuzax.pbworks.com/f/ejercicios_de_matematicas_para_segundo_grado_de_secundaria_resueltos.pdfIn PDF document text
    • http://tukosifana.pbworks.com/w/file/fetch/144824778/super_mario_63_newgrounds_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e702fcd-bd05-4bb0-9c5b-2a184b244b7e/gutugorijapopavaxisabibe.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_off0000e46a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE46A 5616 bytes
SHA-256: 5a7bbb47a9ff84213edc05e7f61bfa7ac59401639f96aacb21006bf909e19d33
font_01_sfnt_off0000f781.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF781 10252 bytes
SHA-256: 7efbf0e12747a4833f08ec6251f5f5013ace465d353cf69054656d8ca291af33

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