Malicious PDF — malware analysis report

Static analysis result for SHA-256 5bf9f89138673051…

MALICIOUS

PDF

79.4 KB Created: 2021-03-13 21:40:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 034eff67ec02701dac544a0643e3528d SHA-1: b1e2404b0b2bab16faa89c88f9273914a374e4b8 SHA-256: 5bf9f89138673051f4484254d0be42614bafb169d1f994914d16a5cec09c4bb5
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous external links, many pointing to disposable hosting services, indicative of a link farm or phishing campaign. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs, such as 'https://baarspo.ru/123?utm_term=intruder+netflix+parents+guide', are consistent with a phishing lure designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://baarspo.ru/123?utm_term=intruder+netflix+parents+guide PDF link annotation
    • http://shopyou.online/97485738338w0yyt.pdfIn PDF document text
    • https://cdn.sqhk.co/jumupebuvi/ijidPCs/tukegiramagixivo.pdfIn PDF document text
    • http://help-verifiedbadgecenter.com/salidask9jld.pdfIn PDF document text
    • https://cdn.sqhk.co/wexapitode/gR8Y2kq/93094707909.pdfIn PDF document text
    • https://cdn.sqhk.co/livujiguf/jgfDbTS/xikilabaseboso.pdfIn PDF document text
    • http://sewonmedix.ru/weganexopepoziwu31w22.pdfIn PDF document text
    • http://kompledom.com/dantes_inferno_psp_gameplay_part_1cnj9v.pdfIn PDF document text
    • http://outputqwvk.space/97602289451d7elw.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://78ff948a-0765-49f5-a22c-0fbe0eba7848.filesusr.com/ugd/888d0b_b962a41e08ad495195493c555e47c7fd.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/93456255-5523-4e7a-a6ca-93eb9c34a4e0/carl_sagan_cosmos.pdfIn PDF document text
    • https://71a0d42b-91d5-4e94-9338-ff69ca8a624b.filesusr.com/ugd/e5d5e5_3d566e15bbba408185ce7a419b21242c.pdf?index=trueIn PDF document text
    • https://1527c8d3-3321-4e9f-872f-e2bebb57bac2.filesusr.com/ugd/bf2d42_06dbc031268f4cc191bf581e5a28777d.pdf?index=trueIn PDF document text
    • https://3857ddc0-2b33-46ba-b4a8-ebef9b167687.filesusr.com/ugd/5cc0d5_290439ae47d44ae48e883c7793afe2b2.pdf?index=trueIn PDF document text
    • https://d4180a97-8dd0-4bf1-9e2f-d1b128d1a64d.filesusr.com/ugd/ae059d_e4c8059d57b44bf4a0c83e165682d966.pdf?index=trueIn PDF document text
    • https://76c9fb28-c10e-4950-85be-37de24a2ede8.filesusr.com/ugd/fa32a6_9be50b57b1db44b58c23160b91071643.pdf?index=trueIn PDF document text
    • https://9462281c-6212-45c1-8f90-c4e3c363a226.filesusr.com/ugd/007d40_a395f4c641894cfcb2563675fb1405ea.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/b4fafc4c-fedc-4b7a-81a2-15d043aa4053/is_harry_potter_movies_on_amazon_prime.pdfIn PDF document text
    • https://5e9816b5-e261-4a84-a5c7-594b6999e1c8.filesusr.com/ugd/eb2f7d_7e33ed7d37bc49f99674c844c4a35af3.pdf?index=trueIn PDF document text
    • https://d62ff7d9-aefc-4ab8-8cdf-af38868aea16.filesusr.com/ugd/54b9a1_94b3b4edd7f1435f87036cc2755d7cf0.pdf?index=trueIn PDF document text
    • https://ba428ff1-d53d-4eb5-bdb2-cc960067f420.filesusr.com/ugd/7041e4_8ba3cb0b293f481f86157222c0b5b680.pdf?index=trueIn PDF document text
    • https://5e9c932d-19a8-4d5a-a970-d4bc0bcb832b.filesusr.com/ugd/bae0a0_ca31e2d4594747e381ab6b0793972052.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB9C 4984 bytes
SHA-256: c3dc663488e49a2636317ef0bd106d66884cb10f8d495f73b23f845231c1202a
font_01_sfnt_off0000fc90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC90 11016 bytes
SHA-256: be045a17dd04f26b22f51d602b0b7b996f37e5a3e126530f00926869dfa62a05
font_02_sfnt_off00012221.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12221 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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