Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ae0219f414e3d21…

MALICIOUS

PDF

81.9 KB Created: 2021-03-18 11:31:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 2a2ba01711957b22907c49f825cf50ac SHA-1: 3764254e98504ee8274fbc264db047ff3b04e2e4 SHA-256: 7ae0219f414e3d21110fb895919056cce7032a34855a97affff9e276ef8b0c9a
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://druttle.ru/strik?utm_term=which+best+describes+the+grounded+theory+method PDF link annotation
    • http://lojisaka.22web.org/belakiwu.pdfIn PDF document text
    • http://kekewawoxugar.sportsontheweb.net/nunuvum.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367922/normal_60397787b703d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477164/normal_5fd8e47eec191.pdfIn PDF document text
    • http://kiritisivasol.mywebcommunity.org/how_to_build_a_weight_bench_out_of_wood.pdfIn PDF document text
    • http://fodefon.getenjoyment.net/algorithms_and_flowcharts_with_examples.pdfIn PDF document text
    • http://tigibisolefora.mygamesonline.org/19886370911.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/cdbb9c49-14dc-47fc-a08d-e19096cfbc4d/rajunujapaku.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c34d184-24c0-4305-bac3-2637f05a622c/api_570_certification_verification.pdfIn PDF document text
    • http://lawesiwewif.onlinewebshop.net/is_there_a_wireless_vr_headset_for_ps4.pdfIn PDF document text
    • http://jikafazasakojob.epizy.com/bachelor_thesis_example.pdfIn PDF document text
    • https://s3.amazonaws.com/zexozavo/84770378285.pdfIn PDF document text
    • http://dilepivulibav.epizy.com/pufebemuwi.pdfIn PDF document text
    • https://s3.amazonaws.com/megelugik/ready_answer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f7f49c5c-4a7f-4019-93f7-c811bcb6aae1/bewuk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5102da47-8aca-41b7-886b-313fc587243a/gusuriba.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/83d5c55c-6c2a-4390-9ee3-fb6d2f0b3a8b/wejunosajo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b74a3b7-61b7-45a2-8818-6a0d11e1cc4e/vita_spas_prices.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f676.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF676 3080 bytes
SHA-256: 3ea9dc0fe5daeba8b7c1286de8752a991578e51b79301a8010be3d8f06b4997c
font_01_sfnt_off0001017e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1017E 5364 bytes
SHA-256: 3133d45bbf31f24fd7ab88384d0aab140f8b35b6b3a165b2a0bf04df81679dcb
font_02_sfnt_off000113a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113A8 11272 bytes
SHA-256: 4dca1220cc69de2c13a4e1bc285fb0a4443aaf04a214265d1affbf86fb39c66c

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