Malicious PDF — malware analysis report

Static analysis result for SHA-256 07ee722de389b5a8…

MALICIOUS

PDF

75.9 KB Created: 2021-03-04 22:53:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f299295ba253ef497028721c2312f582 SHA-1: 15fba1399845436718ba0afb49546ac9c988cd5c SHA-256: 07ee722de389b5a8b208171b8dde08fd6430fe7dd663f25bafc26322208f9170
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to potentially malicious domains, indicating a link farm or phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document designed to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://nipisod.ru/123?utm_term=spanish+prepositions+list+quizlet
    • http://lepasipun.iblogger.org/k_p_a_c_full_form.pdf
    • https://tunilawogipafex.weebly.com/uploads/1/3/2/8/132814387/delilosagasuze-tetej-kenixopaso-topipo.pdf
    • http://kosazajodexev.22web.org/darud.pdf
    • https://gilaxisob.weebly.com/uploads/1/3/1/4/131406303/xofunepewi-turejekerebeki-narilorasut.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/73386b35-0421-4cf0-86cf-4f797700a0c7/how_will_you_measure_your_life_quotes.pdf
    • https://s3.amazonaws.com/dukavunivifa/colleen_campbell_reporter_instagram.pdf
    • http://ramakumoda.epizy.com/99692343884.pdf
    • http://zakivijojinikij.epizy.com/vuredeparafazixa.pdf
    • https://uploads.strikinglycdn.com/files/5f94f495-2f0b-4bc6-8b8b-09615343e287/94448307861.pdf
    • https://uploads.strikinglycdn.com/files/78d2049e-6f14-4764-ba82-4d5faf851857/char_broil_grill_cover_warranty.pdf
    • https://uploads.strikinglycdn.com/files/ba709031-8fea-4a08-b703-af35ad836ae1/how_to_use_maytag_quiet_series_300.pdf
    • https://uploads.strikinglycdn.com/files/ca7d99ca-6446-4d06-a93e-1f74edb0aa49/msi_gtx_970_4gb_oc_benchmark.pdf
    • http://gedamodeges.epizy.com/cheat_sheet_python_3.pdf
    • https://uploads.strikinglycdn.com/files/5ef77874-7725-4963-8a19-086068a450a6/vakopebaz.pdf
    • https://b0c090b1-cb02-46d8-8a69-3fb9d82636b6.filesusr.com/ugd/4dbf3f_68426f04f8cd49d3b6a1c7f7b9da6f82.pdf?index=true
    • https://044e8d80-c429-4a1f-820d-9b443c65b389.filesusr.com/ugd/53c654_204257187f7842828e69fda2916e19e6.pdf?index=true
    • https://uploads.strikinglycdn.com/files/254f30c9-9c05-4c3e-b19c-10da618b7947/wapowodawutebat.pdf
    • https://72dfff08-f6cb-4f5d-aaac-ebe71175d6a6.filesusr.com/ugd/c268f7_1a3ad65660c04c07b6bb3f7a740f5500.pdf?index=true
    • https://uploads.strikinglycdn.com/files/d6fcec16-3501-40e3-bf39-f403fff54918/how_to_turn_on_acer_backlit_keyboard.pdf
    • https://s3.amazonaws.com/jobavo/vubimib.pdf
    • https://s3.amazonaws.com/muvarelo/44129882614.pdf
    • https://s3.amazonaws.com/fopalew/tithi_bhattacharya_social_reproduction_theory.pdf
    • https://uploads.strikinglycdn.com/files/fec72e66-51ca-4704-b5cd-b7c21c788641/rokozazifavejof.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ebfe.bin
b5758c18b80a69760d5deabee1714bacaffc17a615f61cdf19b4a243f9a45bad		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEBFE 5188 bytes
font_01_sfnt_off0000fd9f.bin
5f79fc82d8cddb9ec11766c42264155b8167ccf53a4760c6e26377a9d5db9f4b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFD9F 11204 bytes

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