Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7e9f3b0395db9b4…

MALICIOUS

PDF

70.9 KB Created: 2021-03-11 08:26:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: d1882aa6df8fe946a2c1381115a8f240 SHA-1: 0840ddb7192fae4a32a5f0958e8861b622cd21e4 SHA-256: a7e9f3b0395db9b4f9bc98a42ff6a2b2a6b6f19a2ae0a0fc62967e3a905673e1
126 Risk Score

Malware Insights

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

The file is a PDF document that contains multiple embedded URLs, many of which point to disposable domains or link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://kuzutuzo.ru/award?keyword=urbanisation+et+droit+de+l+urbanisme+au+maroc+pdf PDF link annotation
    • https://cdn.sqhk.co/baluwofuk/jfhjghJ/59676737942.pdfIn PDF document text
    • http://memisada.mygamesonline.org/zuvovinof.pdfIn PDF document text
    • https://gokixojegesefa.weebly.com/uploads/1/3/4/8/134864476/2749258.pdfIn PDF document text
    • https://cdn.sqhk.co/buvovemif/digAgiv/dreamlines_mein_schiff_4.pdfIn PDF document text
    • http://sutivetowit.mypressonline.com/mastering_apache_camel_free_download.pdfIn PDF document text
    • https://wuvumivew.weebly.com/uploads/1/3/1/4/131410662/3950078.pdfIn PDF document text
    • http://faxadiweruxu.22web.org/77110267960.pdfIn PDF document text
    • https://tedaliduvif.weebly.com/uploads/1/3/5/9/135957254/d912d8470.pdfIn PDF document text
    • http://lilubaxubaxulu.sportsontheweb.net/monadunolugi.pdfIn PDF document text
    • https://cdn.sqhk.co/nasubivapu/8yZgdoc/logo_quiz_answer_53.pdfIn PDF document text
    • https://cdn.sqhk.co/fakomuse/hchd1zP/motod.pdfIn PDF document text
    • https://cdn.sqhk.co/sarowojep/ghaHjgE/83121226086.pdfIn PDF document text
    • http://dusibarupuguli.medianewsonline.com/manual_de_energias_renovables.pdfIn PDF document text
    • https://rufajesovulibo.weebly.com/uploads/1/3/4/2/134235528/3679265.pdfIn PDF document text
    • https://tirawinuzupufe.weebly.com/uploads/1/3/4/4/134445233/5229131.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xemunebo.atwebpages.com/anticorpos_antinucleares.pdfIn PDF document text
    • http://suxivivuvadife.rf.gd/47017766920.pdfIn PDF document text
    • http://zikofizoredu.rf.gd/killing_floor_2_xbox_one_split_screen.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/36caa475-aaed-4026-81f5-3ba21fd09cb9/ruger_sr22_holster_blackhawk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a09615d0-eecb-4f5b-8c47-e63c0a6e7355/lawatibipereveda.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/552c875f-102c-461b-a3b1-0ae9c960231e/dupasojedaxa.pdfIn PDF document text
    • http://kurivixudenetiw.epizy.com/chinese_language_textbook.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f254684-40ba-4a6a-a4c4-0a8ac19f1a2d/the_crucible_act_1_quote_analysis_answers.pdfIn PDF document text
    • http://joriboka.epizy.com/risovilakakobokon.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_off0000d1d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1D5 5432 bytes
SHA-256: 8d3f22c956f6063fc5c40129d17ac415364841100ba8e1bb0760a81264c45db5
font_01_sfnt_off0000e435.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE435 13220 bytes
SHA-256: 3700aadcb52b2e1f827e7d1e348db2b00c969aa080373e72be1856ba0af0d711

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