Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd044524497ea740…

MALICIOUS

PDF

78.1 KB Created: 2021-03-13 21:47:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 7ec2738e1d5dd01f11d1c586e4da436d SHA-1: 929ee6218f303b5552a486916f50435aaea1ea6e SHA-256: fd044524497ea7402e3a1043b214e2761ca44cb86b35af9624f35db4b2c358b5
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one specifically identified as a link farm on disposable hosting, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs point towards an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://jottigo.ru/award?keyword=definition+of+leadership+by+different+authors+pdf PDF link annotation
    • http://paselon.getenjoyment.net/beloved_by_toni_morrison_themes.pdfIn PDF document text
    • https://cdn.sqhk.co/dolitife/jiKyujj/badufufuboxesi.pdfIn PDF document text
    • http://pakawuwujawo.getenjoyment.net/reasons_to_stay_alive_sample.pdfIn PDF document text
    • http://momarivido.mypressonline.com/dawobupovapabanoku.pdfIn PDF document text
    • https://cdn.sqhk.co/nokikijun/gdigiT9/download_bouncy_seed_mod.pdfIn PDF document text
    • https://cdn.sqhk.co/fesoxuleri/Igiifzq/42385007783.pdfIn PDF document text
    • https://cdn.sqhk.co/sirejeforox/Khgczgj/10864146871.pdfIn PDF document text
    • https://cdn.sqhk.co/javeduner/jfZ4Xgc/random_my_little_pony_games_poki.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/1193d8f7-5eaa-41e5-a031-bbc775c6c9a0/xipegumumirupexagomujavil.pdfIn PDF document text
    • http://zifofupox.rf.gd/magia_cabala.pdfIn PDF document text
    • https://s3.amazonaws.com/nowonovege/cpt_69209_guidelines.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/084b9398-4ac4-476c-9ff5-a21675cd9082/nefufubesige.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/041e7dd7-9b82-43e6-9626-e554f8fbfb22/make_your_own_python_text_adventure_download.pdfIn PDF document text
    • http://gakajitaju.atwebpages.com/what_is_the_main_criticism_of_differential_association_theory.pdfIn PDF document text
    • http://dadagax.epizy.com/details_of_assignment_ielts_listening_answers.pdfIn PDF document text
    • http://vexabimumemig.atwebpages.com/kemapox.pdfIn PDF document text
    • https://s3.amazonaws.com/tikofaketonub/arcgis_10._3_manual.pdfIn PDF document text
    • http://dasobiviwadodaj.atwebpages.com/25003144283.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/17e80cb0-c002-4f85-8a15-2279c7ebbb5f/what_jobs_are_in_demand_in_sa.pdfIn PDF document text
    • http://bogalibamadom.myartsonline.com/desde_que_edad_un_perro_es_adulto.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/20f4f26a-6e9e-490f-b5e0-d10212324fc2/dawazof.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_off0000f34d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF34D 5372 bytes
SHA-256: 6dbf09216a203f1153b1115a2d3937c006b158b24d40d25b81ee2b7d1e4c8bfb
font_01_sfnt_off00010590.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10590 11064 bytes
SHA-256: 7dce18f5bf4c5b7608d3b281d29d0c6bb901f813c24fd83f56dd322d19734a62

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